26257990 has 16 divisors (see below), whose sum is σ = 51561360. Its totient is φ = 9548320.

The previous prime is 26257967. The next prime is 26258039. The reversal of 26257990 is 9975262.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119245 + ... + 119464.

It is an arithmetic number, because the mean of its divisors is an integer number (3222585).

Almost surely, 2^26257990 is an apocalyptic number.

26257990 is a deficient number, since it is larger than the sum of its proper divisors (25303370).

26257990 is a wasteful number, since it uses less digits than its factorization.

26257990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238727.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 26257990 is about 5124.2550678123. The cubic root of 26257990 is about 297.2262481897.

The spelling of 26257990 in words is "twenty-six million, two hundred fifty-seven thousand, nine hundred ninety".