87780715 has 8 divisors (see below), whose sum is σ = 114913008. Its totient is φ = 63840480.

The previous prime is 87780697. The next prime is 87780727. The reversal of 87780715 is 51708778.

It is a happy number.

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

It is not a de Polignac number, because 87780715 - 2¹⁷ = 87649643 is a prime.

It is a super-2 number, since 2×87780715² = 15410907851822450, which contains 22 as substring.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 87780 and 715 contains 87780715 itself.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797952 + ... + 798061.

It is an arithmetic number, because the mean of its divisors is an integer number (14364126).

Almost surely, 2^87780715 is an apocalyptic number.

87780715 is a deficient number, since it is larger than the sum of its proper divisors (27132293).

87780715 is a wasteful number, since it uses less digits than its factorization.

87780715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596029.

The product of its (nonzero) digits is 109760, while the sum is 43.

The square root of 87780715 is about 9369.1362995743. The cubic root of 87780715 is about 444.4262521141.

The spelling of 87780715 in words is "eighty-seven million, seven hundred eighty thousand, seven hundred fifteen".