28359880 has 16 divisors (see below), whose sum is σ = 63809820. Its totient is φ = 11343936.

The previous prime is 28359853. The next prime is 28359887. The reversal of 28359880 is 8895382.

It can be written as a sum of positive squares in 2 ways, for example, as 24383844 + 3976036 = 4938^2 + 1994^2 .

It is a super-2 number, since 2×28359880² = 1608565587228800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28359887) 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, 354459 + ... + 354538.

Almost surely, 2^28359880 is an apocalyptic number.

28359880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28359880 is an abundant number, since it is smaller than the sum of its proper divisors (35449940).

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

28359880 is a wasteful number, since it uses less digits than its factorization.

28359880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709008 (or 709004 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 28359880 is about 5325.3995155293. The cubic root of 28359880 is about 304.9543244331.

The spelling of 28359880 in words is "twenty-eight million, three hundred fifty-nine thousand, eight hundred eighty".