87378765 has 8 divisors (see below), whose sum is σ = 139806048. Its totient is φ = 46602000.

The previous prime is 87378757. The next prime is 87378803. The reversal of 87378765 is 56787378.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87378765 - 2³ = 87378757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2912611 + ... + 2912640.

It is an arithmetic number, because the mean of its divisors is an integer number (17475756).

Almost surely, 2^87378765 is an apocalyptic number.

It is an amenable number.

87378765 is a deficient number, since it is larger than the sum of its proper divisors (52427283).

87378765 is a wasteful number, since it uses less digits than its factorization.

87378765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5825259.

The product of its digits is 1975680, while the sum is 51.

The square root of 87378765 is about 9347.6609373682. The cubic root of 87378765 is about 443.7468679274.

The spelling of 87378765 in words is "eighty-seven million, three hundred seventy-eight thousand, seven hundred sixty-five".