25220388 has 48 divisors (see below), whose sum is σ = 60850944. Its totient is φ = 8125440.

The previous prime is 25220383. The next prime is 25220399. The reversal of 25220388 is 88302252.

It is not an unprimeable number, because it can be changed into a prime (25220383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54478 + ... + 54938.

It is an arithmetic number, because the mean of its divisors is an integer number (1267728).

Almost surely, 2^25220388 is an apocalyptic number.

It is an amenable number.

25220388 is an abundant number, since it is smaller than the sum of its proper divisors (35630556).

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

25220388 is a wasteful number, since it uses less digits than its factorization.

25220388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 25220388 is about 5021.9904420459. The cubic root of 25220388 is about 293.2584858391.

The spelling of 25220388 in words is "twenty-five million, two hundred twenty thousand, three hundred eighty-eight".