87880428 has 18 divisors (see below), whose sum is σ = 222142284. Its totient is φ = 29293464.

The previous prime is 87880423. The next prime is 87880451. The reversal of 87880428 is 82408878.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (87880421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1220526 + ... + 1220597.

It is an arithmetic number, because the mean of its divisors is an integer number (12341238).

Almost surely, 2^87880428 is an apocalyptic number.

It is an amenable number.

87880428 is an abundant number, since it is smaller than the sum of its proper divisors (134261856).

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

87880428 is a wasteful number, since it uses less digits than its factorization.

87880428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441133 (or 2441128 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 87880428 is about 9374.4561442251. The cubic root of 87880428 is about 444.5944678998.

The spelling of 87880428 in words is "eighty-seven million, eight hundred eighty thousand, four hundred twenty-eight".