25475940 has 72 divisors (see below), whose sum is σ = 88320960. Its totient is φ = 5822784.

The previous prime is 25475939. The next prime is 25475981. The reversal of 25475940 is 4957452.

25475940 is a `hidden beast` number, since 25 + 47 + 594 + 0 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 25475895 and 25475904.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8850 + ... + 11369.

It is an arithmetic number, because the mean of its divisors is an integer number (1226680).

Almost surely, 2^25475940 is an apocalyptic number.

25475940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25475940 is an abundant number, since it is smaller than the sum of its proper divisors (62845020).

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

25475940 is a wasteful number, since it uses less digits than its factorization.

25475940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20241 (or 20236 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 25475940 is about 5047.3696119860. The cubic root of 25475940 is about 294.2456644437.

The spelling of 25475940 in words is "twenty-five million, four hundred seventy-five thousand, nine hundred forty".