87788515 has 8 divisors (see below), whose sum is σ = 105467328. Its totient is φ = 70150080.

The previous prime is 87788501. The next prime is 87788521. The reversal of 87788515 is 51588778.

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

It is not a de Polignac number, because 87788515 - 2⁵ = 87788483 is a prime.

It is a Duffinian 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, 5082 + ... + 14191.

It is an arithmetic number, because the mean of its divisors is an integer number (13183416).

Almost surely, 2^87788515 is an apocalyptic number.

87788515 is a deficient number, since it is larger than the sum of its proper divisors (17678813).

87788515 is a wasteful number, since it uses less digits than its factorization.

87788515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20189.

The product of its digits is 627200, while the sum is 49.

The square root of 87788515 is about 9369.5525506824. The cubic root of 87788515 is about 444.4394153019.

The spelling of 87788515 in words is "eighty-seven million, seven hundred eighty-eight thousand, five hundred fifteen".