78877887 has 32 divisors (see below), whose sum is σ = 117642240. Its totient is φ = 46609920.

The previous prime is 78877871. The next prime is 78877889.

78877887 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78877887 - 2⁴ = 78877871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78877887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78877889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329914 + ... + 330152.

It is an arithmetic number, because the mean of its divisors is an integer number (3676320).

Almost surely, 2^78877887 is an apocalyptic number.

78877887 is a deficient number, since it is larger than the sum of its proper divisors (38764353).

78877887 is a wasteful number, since it uses less digits than its factorization.

78877887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463.

The product of its digits is 9834496, while the sum is 60.

The square root of 78877887 is about 8881.3223677558. The cubic root of 78877887 is about 428.8628454028.

The spelling of 78877887 in words is "seventy-eight million, eight hundred seventy-seven thousand, eight hundred eighty-seven".