25624420 has 12 divisors (see below), whose sum is σ = 53811324. Its totient is φ = 10249760.

The previous prime is 25624411. The next prime is 25624421. The reversal of 25624420 is 2442652.

It can be written as a sum of positive squares in 2 ways, for example, as 9108324 + 16516096 = 3018^2 + 4064^2 .

It is a super-2 number, since 2×25624420² = 1313221800672800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25624421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640591 + ... + 640630.

It is an arithmetic number, because the mean of its divisors is an integer number (4484277).

Almost surely, 2^25624420 is an apocalyptic number.

25624420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25624420 is an abundant number, since it is smaller than the sum of its proper divisors (28186904).

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

25624420 is a wasteful number, since it uses less digits than its factorization.

25624420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281230 (or 1281228 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 25624420 is about 5062.0568941884. The cubic root of 25624420 is about 294.8162026606.

The spelling of 25624420 in words is "twenty-five million, six hundred twenty-four thousand, four hundred twenty".