26993428 has 24 divisors (see below), whose sum is σ = 58895424. Its totient is φ = 10516800.

The previous prime is 26993423. The next prime is 26993437. The reversal of 26993428 is 82439962.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26993423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43513 + ... + 44128.

It is an arithmetic number, because the mean of its divisors is an integer number (2453976).

Almost surely, 2^26993428 is an apocalyptic number.

26993428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26993428 is an abundant number, since it is smaller than the sum of its proper divisors (31901996).

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

26993428 is a wasteful number, since it uses less digits than its factorization.

26993428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87663 (or 87661 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 26993428 is about 5195.5199932249. The cubic root of 26993428 is about 299.9756572841.

It can be divided in two parts, 269934 and 28, that added together give a palindrome (269962).

The spelling of 26993428 in words is "twenty-six million, nine hundred ninety-three thousand, four hundred twenty-eight".