25557340 has 12 divisors (see below), whose sum is σ = 53670456. Its totient is φ = 10222928.

The previous prime is 25557317. The next prime is 25557359. The reversal of 25557340 is 4375552.

It is a congruent number.

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, 638914 + ... + 638953.

It is an arithmetic number, because the mean of its divisors is an integer number (4472538).

Almost surely, 2^25557340 is an apocalyptic number.

25557340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25557340 is an abundant number, since it is smaller than the sum of its proper divisors (28113116).

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

25557340 is a wasteful number, since it uses less digits than its factorization.

25557340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277876 (or 1277874 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 25557340 is about 5055.4267871269. The cubic root of 25557340 is about 294.5587197219.

The spelling of 25557340 in words is "twenty-five million, five hundred fifty-seven thousand, three hundred forty".