25607220 has 24 divisors (see below), whose sum is σ = 71700384. Its totient is φ = 6828576.

The previous prime is 25607213. The next prime is 25607221. The reversal of 25607220 is 2270652.

It is a super-2 number, since 2×25607220² = 1311459432256800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25607221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213334 + ... + 213453.

It is an arithmetic number, because the mean of its divisors is an integer number (2987516).

Almost surely, 2^25607220 is an apocalyptic number.

25607220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25607220 is an abundant number, since it is smaller than the sum of its proper divisors (46093164).

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

25607220 is a wasteful number, since it uses less digits than its factorization.

25607220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426799 (or 426797 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 25607220 is about 5060.3576948670. The cubic root of 25607220 is about 294.7502242738.

Adding to 25607220 its reverse (2270652), we get a palindrome (27877872).

The spelling of 25607220 in words is "twenty-five million, six hundred seven thousand, two hundred twenty".