25613880 has 32 divisors (see below), whose sum is σ = 76842000. Its totient is φ = 6830336.

The previous prime is 25613867. The next prime is 25613897. The reversal of 25613880 is 8831652.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 106605 + ... + 106844.

Almost surely, 2^25613880 is an apocalyptic number.

25613880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25613880 is an abundant number, since it is smaller than the sum of its proper divisors (51228120).

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

25613880 is a wasteful number, since it uses less digits than its factorization.

25613880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213463 (or 213459 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 25613880 is about 5061.0157083337. The cubic root of 25613880 is about 294.7757752230.

It can be divided in two parts, 2561 and 3880, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 25613880 in words is "twenty-five million, six hundred thirteen thousand, eight hundred eighty".