25990458 has 32 divisors (see below), whose sum is σ = 57044736. Its totient is φ = 7844928.

The previous prime is 25990457. The next prime is 25990469. The reversal of 25990458 is 85409952.

It is not an unprimeable number, because it can be changed into a prime (25990457) 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, 991 + ... + 7277.

It is an arithmetic number, because the mean of its divisors is an integer number (1782648).

Almost surely, 2^25990458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25990458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28522368).

25990458 is an abundant number, since it is smaller than the sum of its proper divisors (31054278).

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

25990458 is a wasteful number, since it uses less digits than its factorization.

25990458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6358.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 25990458 is about 5098.0837576486. The cubic root of 25990458 is about 296.2133612044.

The spelling of 25990458 in words is "twenty-five million, nine hundred ninety thousand, four hundred fifty-eight".