25978494 has 16 divisors (see below), whose sum is σ = 52026768. Its totient is φ = 8647872.

The previous prime is 25978487. The next prime is 25978501. The reversal of 25978494 is 49487952.

It is an interprime number because it is at equal distance from previous prime (25978487) and next prime (25978501).

It is a super-3 number, since 3×25978494³ (a number of 23 digits) contains 333 as substring.

It is a congruent 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, 2794 + ... + 7730.

It is an arithmetic number, because the mean of its divisors is an integer number (3251673).

Almost surely, 2^25978494 is an apocalyptic number.

25978494 is an abundant number, since it is smaller than the sum of its proper divisors (26048274).

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

25978494 is a wasteful number, since it uses less digits than its factorization.

25978494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5819.

The product of its digits is 725760, while the sum is 48.

The square root of 25978494 is about 5096.9102405281. The cubic root of 25978494 is about 296.1679029755.

The spelling of 25978494 in words is "twenty-five million, nine hundred seventy-eight thousand, four hundred ninety-four".