25440858 has 32 divisors (see below), whose sum is σ = 56790720. Its totient is φ = 8442000.

The previous prime is 25440853. The next prime is 25440871. The reversal of 25440858 is 85804452.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25440853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12616 + ... + 14492.

It is an arithmetic number, because the mean of its divisors is an integer number (1774710).

Almost surely, 2^25440858 is an apocalyptic number.

25440858 is an abundant number, since it is smaller than the sum of its proper divisors (31349862).

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

25440858 is a wasteful number, since it uses less digits than its factorization.

25440858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139 (or 2133 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 25440858 is about 5043.8931392328. The cubic root of 25440858 is about 294.1105373607.

The spelling of 25440858 in words is "twenty-five million, four hundred forty thousand, eight hundred fifty-eight".