87800028 has 24 divisors (see below), whose sum is σ = 205071888. Its totient is φ = 29237376.

The previous prime is 87800021. The next prime is 87800057. The reversal of 87800028 is 82000878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87800021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11250 + ... + 17382.

It is an arithmetic number, because the mean of its divisors is an integer number (8544662).

Almost surely, 2^87800028 is an apocalyptic number.

It is an amenable number.

87800028 is an abundant number, since it is smaller than the sum of its proper divisors (117271860).

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

87800028 is a wasteful number, since it uses less digits than its factorization.

87800028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333 (or 7331 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 87800028 is about 9370.1669142017. The cubic root of 87800028 is about 444.4588430798.

The spelling of 87800028 in words is "eighty-seven million, eight hundred thousand, twenty-eight".