87856730 has 32 divisors (see below), whose sum is σ = 171584784. Its totient is φ = 32196096.

The previous prime is 87856721. The next prime is 87856733. The reversal of 87856730 is 3765878.

It can be written as a sum of positive squares in 8 ways, for example, as 17783089 + 70073641 = 4217^2 + 8371^2 .

It is not an unprimeable number, because it can be changed into a prime (87856733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15344 + ... + 20276.

Almost surely, 2^87856730 is an apocalyptic number.

87856730 is a deficient number, since it is larger than the sum of its proper divisors (83728054).

87856730 is a wasteful number, since it uses less digits than its factorization.

87856730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5090.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 87856730 is about 9373.1920923451. The cubic root of 87856730 is about 444.5545009161.

The spelling of 87856730 in words is "eighty-seven million, eight hundred fifty-six thousand, seven hundred thirty".