87644678 has 16 divisors (see below), whose sum is σ = 145771920. Its totient is φ = 39184800.

The previous prime is 87644659. The next prime is 87644681.

87644678 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent 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, 31313 + ... + 33996.

It is an arithmetic number, because the mean of its divisors is an integer number (9110745).

Almost surely, 2^87644678 is an apocalyptic number.

87644678 is a deficient number, since it is larger than the sum of its proper divisors (58127242).

87644678 is a wasteful number, since it uses less digits than its factorization.

87644678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65383.

The product of its digits is 1806336, while the sum is 50.

The square root of 87644678 is about 9361.8736372587. The cubic root of 87644678 is about 444.1965521832.

It can be divided in two parts, 876 and 44678, that added together give a palindrome (45554).

The spelling of 87644678 in words is "eighty-seven million, six hundred forty-four thousand, six hundred seventy-eight".