87739956 has 48 divisors (see below), whose sum is σ = 228412800. Its totient is φ = 29126016.

The previous prime is 87739943. The next prime is 87739969. The reversal of 87739956 is 65993778.

It is an interprime number because it is at equal distance from previous prime (87739943) and next prime (87739969).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 26860 + ... + 29948.

It is an arithmetic number, because the mean of its divisors is an integer number (4758600).

Almost surely, 2^87739956 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 87739956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114206400).

87739956 is an abundant number, since it is smaller than the sum of its proper divisors (140672844).

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

87739956 is a wasteful number, since it uses less digits than its factorization.

87739956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365 (or 3357 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 87739956 is about 9366.9608731968. The cubic root of 87739956 is about 444.3574550213.

The spelling of 87739956 in words is "eighty-seven million, seven hundred thirty-nine thousand, nine hundred fifty-six".