26897899392 has 1152 divisors, whose sum is σ = 107623676160. Its totient is φ = 6521389056.

The previous prime is 26897899387. The next prime is 26897899397. The reversal of 26897899392 is 29399879862.

26897899392 is a `hidden beast` number, since 2 + 6 + 89 + 78 + 99 + 392 = 666.

It is an interprime number because it is at equal distance from previous prime (26897899387) and next prime (26897899397).

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 26897899392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26897899397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 625532523 + ... + 625532565.

It is an arithmetic number, because the mean of its divisors is an integer number (93423330).

Almost surely, 2^26897899392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26897899392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53811838080).

26897899392 is an abundant number, since it is smaller than the sum of its proper divisors (80725776768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26897899392 is a wasteful number, since it uses less digits than its factorization.

26897899392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 85 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 26897899392 in words is "twenty-six billion, eight hundred ninety-seven million, eight hundred ninety-nine thousand, three hundred ninety-two".