25719988 has 24 divisors (see below), whose sum is σ = 52315200. Its totient is φ = 10835328.

The previous prime is 25719983. The next prime is 25720001. The reversal of 25719988 is 88991752.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25719983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6133 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (2179800).

Almost surely, 2^25719988 is an apocalyptic number.

25719988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25719988 is an abundant number, since it is smaller than the sum of its proper divisors (26595212).

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

25719988 is a wasteful number, since it uses less digits than its factorization.

25719988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15639 (or 15637 counting only the distinct ones).

The product of its digits is 362880, while the sum is 49.

The square root of 25719988 is about 5071.4877501577. The cubic root of 25719988 is about 295.1822602521.

The spelling of 25719988 in words is "twenty-five million, seven hundred nineteen thousand, nine hundred eighty-eight".