25397890 has 32 divisors (see below), whose sum is σ = 52602624. Its totient is φ = 8648640.

The previous prime is 25397863. The next prime is 25397893. The reversal of 25397890 is 9879352.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25397893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9835 + ... + 12145.

It is an arithmetic number, because the mean of its divisors is an integer number (1643832).

Almost surely, 2^25397890 is an apocalyptic number.

25397890 is an abundant number, since it is smaller than the sum of its proper divisors (27204734).

25397890 is a wasteful number, since it uses less digits than its factorization.

25397890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 25397890 is about 5039.6319310045. The cubic root of 25397890 is about 293.9448660246.

The spelling of 25397890 in words is "twenty-five million, three hundred ninety-seven thousand, eight hundred ninety".