28067928 has 32 divisors (see below), whose sum is σ = 80194560. Its totient is φ = 8019360.

The previous prime is 28067891. The next prime is 28067939. The reversal of 28067928 is 82976082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 28067928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83368 + ... + 83703.

It is an arithmetic number, because the mean of its divisors is an integer number (2506080).

Almost surely, 2^28067928 is an apocalyptic number.

28067928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28067928 is an abundant number, since it is smaller than the sum of its proper divisors (52126632).

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

28067928 is a wasteful number, since it uses less digits than its factorization.

28067928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167087 (or 167083 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 28067928 is about 5297.9173266483. The cubic root of 28067928 is about 303.9042577077.

The spelling of 28067928 in words is "twenty-eight million, sixty-seven thousand, nine hundred twenty-eight".