25440102 has 32 divisors (see below), whose sum is σ = 56849760. Its totient is φ = 8432640.

The previous prime is 25440091. The next prime is 25440167. The reversal of 25440102 is 20104452.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 9202 + ... + 11642.

It is an arithmetic number, because the mean of its divisors is an integer number (1776555).

Almost surely, 2^25440102 is an apocalyptic number.

25440102 is an abundant number, since it is smaller than the sum of its proper divisors (31409658).

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

25440102 is a wasteful number, since it uses less digits than its factorization.

25440102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2639 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25440102 is about 5043.8181965650. The cubic root of 25440102 is about 294.1076240710.

Adding to 25440102 its reverse (20104452), we get a palindrome (45544554).

The spelling of 25440102 in words is "twenty-five million, four hundred forty thousand, one hundred two".