87138396 has 96 divisors (see below), whose sum is σ = 247080960. Its totient is φ = 26438400.

The previous prime is 87138377. The next prime is 87138431. The reversal of 87138396 is 69383178.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56151 + ... + 57681.

It is an arithmetic number, because the mean of its divisors is an integer number (2573760).

Almost surely, 2^87138396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87138396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123540480).

87138396 is an abundant number, since it is smaller than the sum of its proper divisors (159942564).

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

87138396 is a wasteful number, since it uses less digits than its factorization.

87138396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592 (or 1584 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 87138396 is about 9334.7949093700. The cubic root of 87138396 is about 443.3395952659.

The spelling of 87138396 in words is "eighty-seven million, one hundred thirty-eight thousand, three hundred ninety-six".