25920428 has 6 divisors (see below), whose sum is σ = 45360756. Its totient is φ = 12960212.

The previous prime is 25920413. The next prime is 25920431. The reversal of 25920428 is 82402952.

It is a junction number, because it is equal to n+sod(n) for n = 25920394 and 25920403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3240050 + ... + 3240057.

It is an arithmetic number, because the mean of its divisors is an integer number (7560126).

Almost surely, 2^25920428 is an apocalyptic number.

It is an amenable number.

25920428 is a deficient number, since it is larger than the sum of its proper divisors (19440328).

25920428 is a wasteful number, since it uses less digits than its factorization.

25920428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480111 (or 6480109 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25920428 is about 5091.2108579394. The cubic root of 25920428 is about 295.9470778285.

The spelling of 25920428 in words is "twenty-five million, nine hundred twenty thousand, four hundred twenty-eight".