28380588 has 12 divisors (see below), whose sum is σ = 66221400. Its totient is φ = 9460192.

The previous prime is 28380581. The next prime is 28380607. The reversal of 28380588 is 88508382.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (28380581) 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, 1182513 + ... + 1182536.

It is an arithmetic number, because the mean of its divisors is an integer number (5518450).

Almost surely, 2^28380588 is an apocalyptic number.

It is an amenable number.

28380588 is an abundant number, since it is smaller than the sum of its proper divisors (37840812).

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

28380588 is a wasteful number, since it uses less digits than its factorization.

28380588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365056 (or 2365054 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 28380588 is about 5327.3434280136. The cubic root of 28380588 is about 305.0285308794.

The spelling of 28380588 in words is "twenty-eight million, three hundred eighty thousand, five hundred eighty-eight".