25539890 has 16 divisors (see below), whose sum is σ = 47971008. Its totient is φ = 9771696.

The previous prime is 25539887. The next prime is 25539911. The reversal of 25539890 is 9893552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55292 + ... + 55751.

It is an arithmetic number, because the mean of its divisors is an integer number (2998188).

Almost surely, 2^25539890 is an apocalyptic number.

25539890 is a deficient number, since it is larger than the sum of its proper divisors (22431118).

25539890 is a wasteful number, since it uses less digits than its factorization.

25539890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111073.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 25539890 is about 5053.7006242950. The cubic root of 25539890 is about 294.4916650135.

The spelling of 25539890 in words is "twenty-five million, five hundred thirty-nine thousand, eight hundred ninety".