25220404 has 24 divisors (see below), whose sum is σ = 48416256. Its totient is φ = 11400000.

The previous prime is 25220399. The next prime is 25220417. The reversal of 25220404 is 40402252.

It is a hoax number, since the sum of its digits (19) 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 7 ways as a sum of consecutive naturals, for example, 6904 + ... + 9904.

It is an arithmetic number, because the mean of its divisors is an integer number (2017344).

Almost surely, 2^25220404 is an apocalyptic number.

It is an amenable number.

25220404 is a deficient number, since it is larger than the sum of its proper divisors (23195852).

25220404 is a wasteful number, since it uses less digits than its factorization.

25220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3207 (or 3205 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 25220404 is about 5021.9920350395. The cubic root of 25220404 is about 293.2585478542.

Adding to 25220404 its reverse (40402252), we get a palindrome (65622656).

The spelling of 25220404 in words is "twenty-five million, two hundred twenty thousand, four hundred four".