27900026040 has 128 divisors (see below), whose sum is σ = 88507883520. Its totient is φ = 7024358400.

The previous prime is 27900026029. The next prime is 27900026041. The reversal of 27900026040 is 4062000972.

It is a happy number.

It is a super-2 number, since 2×27900026040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 27900025989 and 27900026007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27900026041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61057 + ... + 243983.

It is an arithmetic number, because the mean of its divisors is an integer number (691467840).

Almost surely, 2^27900026040 is an apocalyptic number.

27900026040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27900026040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44253941760).

27900026040 is an abundant number, since it is smaller than the sum of its proper divisors (60607857480).

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

27900026040 is a wasteful number, since it uses less digits than its factorization.

27900026040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183013 (or 183009 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The spelling of 27900026040 in words is "twenty-seven billion, nine hundred million, twenty-six thousand, forty".