28567388 has 12 divisors (see below), whose sum is σ = 50325072. Its totient is φ = 14188800.

The previous prime is 28567381. The next prime is 28567391. The reversal of 28567388 is 88376582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28567381) 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, 23045 + ... + 24252.

It is an arithmetic number, because the mean of its divisors is an integer number (4193756).

Almost surely, 2^28567388 is an apocalyptic number.

It is an amenable number.

28567388 is a deficient number, since it is larger than the sum of its proper divisors (21757684).

28567388 is a wasteful number, since it uses less digits than its factorization.

28567388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47452 (or 47450 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The square root of 28567388 is about 5344.8468640364. The cubic root of 28567388 is about 305.6962968507.

The spelling of 28567388 in words is "twenty-eight million, five hundred sixty-seven thousand, three hundred eighty-eight".