25685428 has 12 divisors (see below), whose sum is σ = 45519040. Its totient is φ = 12679992.

The previous prime is 25685399. The next prime is 25685431. The reversal of 25685428 is 82458652.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40326 + ... + 40957.

Almost surely, 2^25685428 is an apocalyptic number.

It is an amenable number.

25685428 is a deficient number, since it is larger than the sum of its proper divisors (19833612).

25685428 is a wasteful number, since it uses less digits than its factorization.

25685428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81366 (or 81364 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 25685428 is about 5068.0793206105. The cubic root of 25685428 is about 295.0499886561.

The spelling of 25685428 in words is "twenty-five million, six hundred eighty-five thousand, four hundred twenty-eight".