25680890 has 16 divisors (see below), whose sum is σ = 47301408. Its totient is φ = 10033296.

The previous prime is 25680877. The next prime is 25680901. The reversal of 25680890 is 9808652.

It is a super-2 number, since 2×25680890² = 1319016222384200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29432 + ... + 30291.

It is an arithmetic number, because the mean of its divisors is an integer number (2956338).

Almost surely, 2^25680890 is an apocalyptic number.

25680890 is a deficient number, since it is larger than the sum of its proper divisors (21620518).

25680890 is a wasteful number, since it uses less digits than its factorization.

25680890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59773.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 25680890 is about 5067.6315967126. The cubic root of 25680890 is about 295.0326115436.

The spelling of 25680890 in words is "twenty-five million, six hundred eighty thousand, eight hundred ninety".