28567928 has 8 divisors (see below), whose sum is σ = 53564880. Its totient is φ = 14283960.

The previous prime is 28567927. The next prime is 28567933. The reversal of 28567928 is 82976582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28567928² = 1632253020426368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28567921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1785488 + ... + 1785503.

It is an arithmetic number, because the mean of its divisors is an integer number (6695610).

Almost surely, 2^28567928 is an apocalyptic number.

It is an amenable number.

28567928 is a deficient number, since it is larger than the sum of its proper divisors (24996952).

28567928 is a wasteful number, since it uses less digits than its factorization.

28567928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570997 (or 3570993 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 28567928 is about 5344.8973797445. The cubic root of 28567928 is about 305.6982229976.

The spelling of 28567928 in words is "twenty-eight million, five hundred sixty-seven thousand, nine hundred twenty-eight".