25623820 has 24 divisors (see below), whose sum is σ = 55666800. Its totient is φ = 9895872.

The previous prime is 25623797. The next prime is 25623821. The reversal of 25623820 is 2832652.

It is not an unprimeable number, because it can be changed into a prime (25623821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21510 + ... + 22669.

It is an arithmetic number, because the mean of its divisors is an integer number (2319450).

Almost surely, 2^25623820 is an apocalyptic number.

25623820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25623820 is an abundant number, since it is smaller than the sum of its proper divisors (30042980).

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

25623820 is a wasteful number, since it uses less digits than its factorization.

25623820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44217 (or 44215 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 25623820 is about 5061.9976293949. The cubic root of 25623820 is about 294.8139015860.

The spelling of 25623820 in words is "twenty-five million, six hundred twenty-three thousand, eight hundred twenty".