25951830 has 16 divisors (see below), whose sum is σ = 62284464. Its totient is φ = 6920480.

The previous prime is 25951829. The next prime is 25951831. The reversal of 25951830 is 3815952.

It is an interprime number because it is at equal distance from previous prime (25951829) and next prime (25951831).

It is a junction number, because it is equal to n+sod(n) for n = 25951791 and 25951800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25951831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432501 + ... + 432560.

It is an arithmetic number, because the mean of its divisors is an integer number (3892779).

Almost surely, 2^25951830 is an apocalyptic number.

25951830 is an abundant number, since it is smaller than the sum of its proper divisors (36332634).

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

25951830 is a wasteful number, since it uses less digits than its factorization.

25951830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865071.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 25951830 is about 5094.2938666708. The cubic root of 25951830 is about 296.0665406164.

The spelling of 25951830 in words is "twenty-five million, nine hundred fifty-one thousand, eight hundred thirty".