28055080 has 16 divisors (see below), whose sum is σ = 63124020. Its totient is φ = 11222016.

The previous prime is 28055057. The next prime is 28055119. The reversal of 28055080 is 8055082.

It can be written as a sum of positive squares in 2 ways, for example, as 26977636 + 1077444 = 5194^2 + 1038^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350649 + ... + 350728.

Almost surely, 2^28055080 is an apocalyptic number.

28055080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28055080 is an abundant number, since it is smaller than the sum of its proper divisors (35068940).

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

28055080 is a wasteful number, since it uses less digits than its factorization.

28055080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701388 (or 701384 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 28055080 is about 5296.7046359033. The cubic root of 28055080 is about 303.8578802454.

The spelling of 28055080 in words is "twenty-eight million, fifty-five thousand, eighty".