25400920 has 32 divisors (see below), whose sum is σ = 57412800. Its totient is φ = 10114048.

The previous prime is 25400911. The next prime is 25400951. The reversal of 25400920 is 2900452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25400891 and 25400900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8232 + ... + 10888.

It is an arithmetic number, because the mean of its divisors is an integer number (1794150).

Almost surely, 2^25400920 is an apocalyptic number.

25400920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25400920 is an abundant number, since it is smaller than the sum of its proper divisors (32011880).

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

25400920 is a wasteful number, since it uses less digits than its factorization.

25400920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907 (or 2903 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 25400920 is about 5039.9325392311. The cubic root of 25400920 is about 293.9565548897.

The spelling of 25400920 in words is "twenty-five million, four hundred thousand, nine hundred twenty".