25338978 has 36 divisors (see below), whose sum is σ = 63866790. Its totient is φ = 7239456.

The previous prime is 25338967. The next prime is 25339001. The reversal of 25338978 is 87983352.

It can be written as a sum of positive squares in only one way, i.e., 22724289 + 2614689 = 4767^2 + 1617^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13483 + ... + 15246.

Almost surely, 2^25338978 is an apocalyptic number.

25338978 is an abundant number, since it is smaller than the sum of its proper divisors (38527812).

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

25338978 is a wasteful number, since it uses less digits than its factorization.

25338978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28751 (or 28741 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 25338978 is about 5033.7836663885. The cubic root of 25338978 is about 293.7174155497.

It can be divided in two parts, 2533 and 8978, that added together give a palindrome (11511).

The spelling of 25338978 in words is "twenty-five million, three hundred thirty-eight thousand, nine hundred seventy-eight".