878624 has 12 divisors (see below), whose sum is σ = 1729854. Its totient is φ = 439296.

The previous prime is 878621. The next prime is 878629. The reversal of 878624 is 426878.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 10000 = 932^2 + 100^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 878624.

It is not an unprimeable number, because it can be changed into a prime (878621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13697 + ... + 13760.

2⁸⁷⁸⁶²⁴ is an apocalyptic number.

It is an amenable number.

878624 is a deficient number, since it is larger than the sum of its proper divisors (851230).

878624 is a wasteful number, since it uses less digits than its factorization.

878624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27467 (or 27459 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 878624 is about 937.3494545792. The cubic root of 878624 is about 95.7784241635.

The spelling of 878624 in words is "eight hundred seventy-eight thousand, six hundred twenty-four".