87513828 has 12 divisors (see below), whose sum is σ = 204198960. Its totient is φ = 29171272.

The previous prime is 87513823. The next prime is 87513863. The reversal of 87513828 is 82831578.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 87513828.

It is not an unprimeable number, because it can be changed into a prime (87513821) 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, 3646398 + ... + 3646421.

It is an arithmetic number, because the mean of its divisors is an integer number (17016580).

Almost surely, 2^87513828 is an apocalyptic number.

It is an amenable number.

87513828 is an abundant number, since it is smaller than the sum of its proper divisors (116685132).

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

87513828 is a wasteful number, since it uses less digits than its factorization.

87513828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7292826 (or 7292824 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 87513828 is about 9354.8825754255. The cubic root of 87513828 is about 443.9753861852.

The spelling of 87513828 in words is "eighty-seven million, five hundred thirteen thousand, eight hundred twenty-eight".