87706788 has 48 divisors (see below), whose sum is σ = 228002880. Its totient is φ = 26054784.

The previous prime is 87706763. The next prime is 87706789. The reversal of 87706788 is 88760778.

It is a super-2 number, since 2×87706788² = 15384961322553888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87706788.

It is not an unprimeable number, because it can be changed into a prime (87706789) 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, 5170 + ... + 14217.

It is an arithmetic number, because the mean of its divisors is an integer number (4750060).

Almost surely, 2^87706788 is an apocalyptic number.

It is an amenable number.

87706788 is an abundant number, since it is smaller than the sum of its proper divisors (140296092).

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

87706788 is a wasteful number, since it uses less digits than its factorization.

87706788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19436 (or 19434 counting only the distinct ones).

The product of its (nonzero) digits is 1053696, while the sum is 51.

The square root of 87706788 is about 9365.1902276462. The cubic root of 87706788 is about 444.3014550478.

The spelling of 87706788 in words is "eighty-seven million, seven hundred six thousand, seven hundred eighty-eight".