87765072 has 20 divisors (see below), whose sum is σ = 226726560. Its totient is φ = 29255008.

The previous prime is 87765071. The next prime is 87765091. The reversal of 87765072 is 27056778.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87765071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914172 + ... + 914267.

It is an arithmetic number, because the mean of its divisors is an integer number (11336328).

Almost surely, 2^87765072 is an apocalyptic number.

It is an amenable number.

87765072 is an abundant number, since it is smaller than the sum of its proper divisors (138961488).

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

87765072 is a wasteful number, since it uses less digits than its factorization.

87765072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828450 (or 1828444 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 87765072 is about 9368.3014469006. The cubic root of 87765072 is about 444.3998508221.

The spelling of 87765072 in words is "eighty-seven million, seven hundred sixty-five thousand, seventy-two".