25778492 has 24 divisors (see below), whose sum is σ = 48352416. Its totient is φ = 11994048.

The previous prime is 25778491. The next prime is 25778507. The reversal of 25778492 is 29487752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383 + ... + 7190.

It is an arithmetic number, because the mean of its divisors is an integer number (2014684).

Almost surely, 2^25778492 is an apocalyptic number.

It is an amenable number.

25778492 is a deficient number, since it is larger than the sum of its proper divisors (22573924).

25778492 is a wasteful number, since it uses less digits than its factorization.

25778492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7637 (or 7635 counting only the distinct ones).

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

The square root of 25778492 is about 5077.2524065679. The cubic root of 25778492 is about 295.4059029894.

The spelling of 25778492 in words is "twenty-five million, seven hundred seventy-eight thousand, four hundred ninety-two".