25620620 has 24 divisors (see below), whose sum is σ = 56143584. Its totient is φ = 9802496.

The previous prime is 25620589. The next prime is 25620631. The reversal of 25620620 is 2602652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27389 + ... + 28308.

It is an arithmetic number, because the mean of its divisors is an integer number (2339316).

Almost surely, 2^25620620 is an apocalyptic number.

25620620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25620620 is an abundant number, since it is smaller than the sum of its proper divisors (30522964).

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

25620620 is a wasteful number, since it uses less digits than its factorization.

25620620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55729 (or 55727 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 25620620 is about 5061.6815387774. The cubic root of 25620620 is about 294.8016285817.

The spelling of 25620620 in words is "twenty-five million, six hundred twenty thousand, six hundred twenty".