7887915 has 64 divisors (see below), whose sum is σ = 17003520. Its totient is φ = 3386880.

The previous prime is 7887889. The next prime is 7887923. The reversal of 7887915 is 5197887.

7887915 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7887915 - 2⁵ = 7887883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15820 + ... + 16310.

It is an arithmetic number, because the mean of its divisors is an integer number (265680).

Almost surely, 2^7887915 is an apocalyptic number.

7887915 is an abundant number, since it is smaller than the sum of its proper divisors (9115605).

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

7887915 is a wasteful number, since it uses less digits than its factorization.

7887915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its digits is 141120, while the sum is 45.

The square root of 7887915 is about 2808.5432166873. The cubic root of 7887915 is about 199.0615618900.

The spelling of 7887915 in words is "seven million, eight hundred eighty-seven thousand, nine hundred fifteen".