26990864 has 20 divisors (see below), whose sum is σ = 52444560. Its totient is φ = 13456800.

The previous prime is 26990861. The next prime is 26990869. The reversal of 26990864 is 46809962.

It is not an unprimeable number, because it can be changed into a prime (26990861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3839 + ... + 8289.

It is an arithmetic number, because the mean of its divisors is an integer number (2622228).

Almost surely, 2^26990864 is an apocalyptic number.

It is an amenable number.

26990864 is a deficient number, since it is larger than the sum of its proper divisors (25453696).

26990864 is a wasteful number, since it uses less digits than its factorization.

26990864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 26990864 is about 5195.2732363178. The cubic root of 26990864 is about 299.9661591458.

The spelling of 26990864 in words is "twenty-six million, nine hundred ninety thousand, eight hundred sixty-four".