25801824 has 48 divisors (see below), whose sum is σ = 68000688. Its totient is φ = 8566272.

The previous prime is 25801817. The next prime is 25801859. The reversal of 25801824 is 42810852.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 25801791 and 25801800.

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, 37774 + ... + 38450.

It is an arithmetic number, because the mean of its divisors is an integer number (1416681).

Almost surely, 2^25801824 is an apocalyptic number.

25801824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25801824 is an abundant number, since it is smaller than the sum of its proper divisors (42198864).

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

25801824 is a wasteful number, since it uses less digits than its factorization.

25801824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 25801824 is about 5079.5495863314. The cubic root of 25801824 is about 295.4949996434.

Subtracting 25801824 from its reverse (42810852), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 25801824 in words is "twenty-five million, eight hundred one thousand, eight hundred twenty-four".