25912978 has 32 divisors (see below), whose sum is σ = 48174336. Its totient is φ = 10179648.

The previous prime is 25912967. The next prime is 25913009. The reversal of 25912978 is 87921952.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31075 + ... + 31897.

It is an arithmetic number, because the mean of its divisors is an integer number (1505448).

Almost surely, 2^25912978 is an apocalyptic number.

25912978 is a deficient number, since it is larger than the sum of its proper divisors (22261358).

25912978 is a wasteful number, since it uses less digits than its factorization.

25912978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018.

The product of its digits is 90720, while the sum is 43.

The square root of 25912978 is about 5090.4791522999. The cubic root of 25912978 is about 295.9187215967.

The spelling of 25912978 in words is "twenty-five million, nine hundred twelve thousand, nine hundred seventy-eight".