872178520 has 32 divisors (see below), whose sum is σ = 1963735200. Its totient is φ = 348634368.

The previous prime is 872178473. The next prime is 872178529. The reversal of 872178520 is 25871278.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872178529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59701 + ... + 72859.

It is an arithmetic number, because the mean of its divisors is an integer number (61366725).

Almost surely, 2^872178520 is an apocalyptic number.

It is an amenable number.

872178520 is an abundant number, since it is smaller than the sum of its proper divisors (1091556680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

872178520 is a wasteful number, since it uses less digits than its factorization.

872178520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14827 (or 14823 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 872178520 is about 29532.6686907905. The cubic root of 872178520 is about 955.4364278108.

The spelling of 872178520 in words is "eight hundred seventy-two million, one hundred seventy-eight thousand, five hundred twenty".