25690988 has 12 divisors (see below), whose sum is σ = 45107832. Its totient is φ = 12803040.

The previous prime is 25690933. The next prime is 25690991. The reversal of 25690988 is 88909652.

It is a super-2 number, since 2×25690988² = 1320053728832288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9233 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (3758986).

Almost surely, 2^25690988 is an apocalyptic number.

It is an amenable number.

25690988 is a deficient number, since it is larger than the sum of its proper divisors (19416844).

25690988 is a wasteful number, since it uses less digits than its factorization.

25690988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21232 (or 21230 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 25690988 is about 5068.6278222020. The cubic root of 25690988 is about 295.0712764667.

The spelling of 25690988 in words is "twenty-five million, six hundred ninety thousand, nine hundred eighty-eight".