87776447 has 16 divisors (see below), whose sum is σ = 101126400. Its totient is φ = 75349440.

The previous prime is 87776443. The next prime is 87776477. The reversal of 87776447 is 74467778.

It is not a de Polignac number, because 87776447 - 2² = 87776443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87776395 and 87776404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87776443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95054 + ... + 95972.

It is an arithmetic number, because the mean of its divisors is an integer number (6320400).

Almost surely, 2^87776447 is an apocalyptic number.

87776447 is a deficient number, since it is larger than the sum of its proper divisors (13349953).

87776447 is a wasteful number, since it uses less digits than its factorization.

87776447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406.

The product of its digits is 1843968, while the sum is 50.

The square root of 87776447 is about 9368.9085276781. The cubic root of 87776447 is about 444.4190491578.

The spelling of 87776447 in words is "eighty-seven million, seven hundred seventy-six thousand, four hundred forty-seven".