25428634 has 48 divisors (see below), whose sum is σ = 50791104. Its totient is φ = 9313920.

The previous prime is 25428629. The next prime is 25428659. The reversal of 25428634 is 43682452.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 25428634.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28357 + ... + 29239.

It is an arithmetic number, because the mean of its divisors is an integer number (1058148).

Almost surely, 2^25428634 is an apocalyptic number.

25428634 is a deficient number, since it is larger than the sum of its proper divisors (25362470).

25428634 is a wasteful number, since it uses less digits than its factorization.

25428634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 920 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 25428634 is about 5042.6812312499. The cubic root of 25428634 is about 294.0634243902.

It can be divided in two parts, 25428 and 634, that added together give a palindrome (26062).

The spelling of 25428634 in words is "twenty-five million, four hundred twenty-eight thousand, six hundred thirty-four".