87815070 has 128 divisors (see below), whose sum is σ = 270950400. Its totient is φ = 19823616.

The previous prime is 87815041. The next prime is 87815083. The reversal of 87815070 is 7051878.

It is a super-2 number, since 2×87815070² = 15422973038209800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 183091 + ... + 183569.

It is an arithmetic number, because the mean of its divisors is an integer number (2116800).

Almost surely, 2^87815070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87815070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135475200).

87815070 is an abundant number, since it is smaller than the sum of its proper divisors (183135330).

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

87815070 is a wasteful number, since it uses less digits than its factorization.

87815070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 87815070 is about 9370.9695336182. The cubic root of 87815070 is about 444.4842233609.

The spelling of 87815070 in words is "eighty-seven million, eight hundred fifteen thousand, seventy".