25728474 has 16 divisors (see below), whose sum is σ = 51988608. Its totient is φ = 8487552.

The previous prime is 25728457. The next prime is 25728487. The reversal of 25728474 is 47482752.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21522 + ... + 22685.

It is an arithmetic number, because the mean of its divisors is an integer number (3249288).

Almost surely, 2^25728474 is an apocalyptic number.

25728474 is an abundant number, since it is smaller than the sum of its proper divisors (26260134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25728474 is a wasteful number, since it uses less digits than its factorization.

25728474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44309.

The product of its digits is 125440, while the sum is 39.

The square root of 25728474 is about 5072.3243192840. The cubic root of 25728474 is about 295.2147206252.

The spelling of 25728474 in words is "twenty-five million, seven hundred twenty-eight thousand, four hundred seventy-four".