25899012 has 72 divisors (see below), whose sum is σ = 70586880. Its totient is φ = 7983360.

The previous prime is 25898993. The next prime is 25899017. The reversal of 25899012 is 21099852.

It is a super-2 number, since 2×25899012² = 1341517645152288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (25899017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25164 + ... + 26172.

Almost surely, 2^25899012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25899012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35293440).

25899012 is an abundant number, since it is smaller than the sum of its proper divisors (44687868).

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

25899012 is a wasteful number, since it uses less digits than its factorization.

25899012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 25899012 is about 5089.1071908538. The cubic root of 25899012 is about 295.8655494815.

The spelling of 25899012 in words is "twenty-five million, eight hundred ninety-nine thousand, twelve".