25720406 has 8 divisors (see below), whose sum is σ = 39213264. Its totient is φ = 12649320.

The previous prime is 25720399. The next prime is 25720427. The reversal of 25720406 is 60402752.

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

It is a congruent number.

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, 105290 + ... + 105533.

It is an arithmetic number, because the mean of its divisors is an integer number (4901658).

Almost surely, 2^25720406 is an apocalyptic number.

25720406 is a deficient number, since it is larger than the sum of its proper divisors (13492858).

25720406 is a wasteful number, since it uses less digits than its factorization.

25720406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210886.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 25720406 is about 5071.5289607770. The cubic root of 25720406 is about 295.1838593393.

The spelling of 25720406 in words is "twenty-five million, seven hundred twenty thousand, four hundred six".