26397920 has 24 divisors (see below), whose sum is σ = 62365464. Its totient is φ = 10559104.

The previous prime is 26397911. The next prime is 26397937. The reversal of 26397920 is 2979362.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82334 + ... + 82653.

It is an arithmetic number, because the mean of its divisors is an integer number (2598561).

Almost surely, 2^26397920 is an apocalyptic number.

26397920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26397920 is an abundant number, since it is smaller than the sum of its proper divisors (35967544).

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

26397920 is a wasteful number, since it uses less digits than its factorization.

26397920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165002 (or 164994 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 26397920 is about 5137.8906177536. The cubic root of 26397920 is about 297.7532903966.

The spelling of 26397920 in words is "twenty-six million, three hundred ninety-seven thousand, nine hundred twenty".