25278264 has 64 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 7659360.

The previous prime is 25278247. The next prime is 25278287. The reversal of 25278264 is 46287252.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2944 + ... + 7695.

It is an arithmetic number, because the mean of its divisors is an integer number (1197000).

Almost surely, 2^25278264 is an apocalyptic number.

25278264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25278264 is an abundant number, since it is smaller than the sum of its proper divisors (51329736).

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

25278264 is a wasteful number, since it uses less digits than its factorization.

25278264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665 (or 10655 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 25278264 is about 5027.7493970961. The cubic root of 25278264 is about 293.4826386379.

The spelling of 25278264 in words is "twenty-five million, two hundred seventy-eight thousand, two hundred sixty-four".