25978724 has 12 divisors (see below), whose sum is σ = 45515904. Its totient is φ = 12974184.

The previous prime is 25978721. The next prime is 25978727. The reversal of 25978724 is 42787952.

It is an interprime number because it is at equal distance from previous prime (25978721) and next prime (25978727).

It is not an unprimeable number, because it can be changed into a prime (25978721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629 + ... + 7235.

It is an arithmetic number, because the mean of its divisors is an integer number (3792992).

Almost surely, 2^25978724 is an apocalyptic number.

It is an amenable number.

25978724 is a deficient number, since it is larger than the sum of its proper divisors (19537180).

25978724 is a wasteful number, since it uses less digits than its factorization.

25978724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7594 (or 7592 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 25978724 is about 5096.9328031670. The cubic root of 25978724 is about 296.1687770115.

The spelling of 25978724 in words is "twenty-five million, nine hundred seventy-eight thousand, seven hundred twenty-four".