25320992 has 24 divisors (see below), whose sum is σ = 49968576. Its totient is φ = 12630592.

The previous prime is 25320991. The next prime is 25321013. The reversal of 25320992 is 29902352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (25320991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20093 + ... + 21315.

It is an arithmetic number, because the mean of its divisors is an integer number (2082024).

Almost surely, 2^25320992 is an apocalyptic number.

It is an amenable number.

25320992 is a deficient number, since it is larger than the sum of its proper divisors (24647584).

25320992 is a wasteful number, since it uses less digits than its factorization.

25320992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 25320992 is about 5031.9968203488. The cubic root of 25320992 is about 293.6479040397.

Adding to 25320992 its sum of digits (32), we get a square (25321024 = 5032²).

The spelling of 25320992 in words is "twenty-five million, three hundred twenty thousand, nine hundred ninety-two".