86977784 has 8 divisors (see below), whose sum is σ = 163083360. Its totient is φ = 43488888.

The previous prime is 86977783. The next prime is 86977817. The reversal of 86977784 is 48777968.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86977783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5436104 + ... + 5436119.

It is an arithmetic number, because the mean of its divisors is an integer number (20385420).

Almost surely, 2^86977784 is an apocalyptic number.

It is an amenable number.

86977784 is a deficient number, since it is larger than the sum of its proper divisors (76105576).

86977784 is a wasteful number, since it uses less digits than its factorization.

86977784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10872229 (or 10872225 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 56.

The square root of 86977784 is about 9326.1880744493. The cubic root of 86977784 is about 443.0670424244.

The spelling of 86977784 in words is "eighty-six million, nine hundred seventy-seven thousand, seven hundred eighty-four".