25670978 has 8 divisors (see below), whose sum is σ = 38547660. Its totient is φ = 12821760.

The previous prime is 25670963. The next prime is 25671011. The reversal of 25670978 is 87907652.

It can be written as a sum of positive squares in 2 ways, for example, as 25331089 + 339889 = 5033^2 + 583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×25670978² = 1317998222952968, 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, 4343 + ... + 8378.

Almost surely, 2^25670978 is an apocalyptic number.

25670978 is a deficient number, since it is larger than the sum of its proper divisors (12876682).

25670978 is a wasteful number, since it uses less digits than its factorization.

25670978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13732.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 25670978 is about 5066.6535306847. The cubic root of 25670978 is about 294.9946489501.

The spelling of 25670978 in words is "twenty-five million, six hundred seventy thousand, nine hundred seventy-eight".