87939312 has 80 divisors (see below), whose sum is σ = 237032448. Its totient is φ = 28062720.

The previous prime is 87939307. The next prime is 87939329. The reversal of 87939312 is 21393978.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167883 + ... + 168405.

Almost surely, 2^87939312 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 87939312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118516224).

87939312 is an abundant number, since it is smaller than the sum of its proper divisors (149093136).

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

87939312 is a wasteful number, since it uses less digits than its factorization.

87939312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 672 counting only the distinct ones).

The product of its digits is 81648, while the sum is 42.

The square root of 87939312 is about 9377.5962804975. The cubic root of 87939312 is about 444.6937454304.

The spelling of 87939312 in words is "eighty-seven million, nine hundred thirty-nine thousand, three hundred twelve".