25831340 has 12 divisors (see below), whose sum is σ = 54245856. Its totient is φ = 10332528.

The previous prime is 25831331. The next prime is 25831397. The reversal of 25831340 is 4313852.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645764 + ... + 645803.

It is an arithmetic number, because the mean of its divisors is an integer number (4520488).

Almost surely, 2^25831340 is an apocalyptic number.

25831340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25831340 is an abundant number, since it is smaller than the sum of its proper divisors (28414516).

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

25831340 is a wasteful number, since it uses less digits than its factorization.

25831340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291576 (or 1291574 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 25831340 is about 5082.4541316179. The cubic root of 25831340 is about 295.6076338864.

The spelling of 25831340 in words is "twenty-five million, eight hundred thirty-one thousand, three hundred forty".