26257992 has 64 divisors (see below), whose sum is σ = 70156800. Its totient is φ = 8171520.

The previous prime is 26257967. The next prime is 26258039. The reversal of 26257992 is 29975262.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20968 + ... + 22184.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^26257992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26257992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35078400).

26257992 is an abundant number, since it is smaller than the sum of its proper divisors (43898808).

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

26257992 is a wasteful number, since it uses less digits than its factorization.

26257992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1282 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 26257992 is about 5124.2552629626. The cubic root of 26257992 is about 297.2262557360.

The spelling of 26257992 in words is "twenty-six million, two hundred fifty-seven thousand, nine hundred ninety-two".