872778 has 8 divisors (see below), whose sum is σ = 1745568. Its totient is φ = 290924.

The previous prime is 872761. The next prime is 872789. The reversal of 872778 is 877278.

It is a sphenic number, since it is the product of 3 distinct primes.

872778 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72726 + ... + 72737.

It is an arithmetic number, because the mean of its divisors is an integer number (218196).

2⁸⁷²⁷⁷⁸ is an apocalyptic number.

872778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

872778 is a wasteful number, since it uses less digits than its factorization.

872778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145468.

The product of its digits is 43904, while the sum is 39.

The square root of 872778 is about 934.2258827500. The cubic root of 872778 is about 95.5655279739.

The spelling of 872778 in words is "eight hundred seventy-two thousand, seven hundred seventy-eight".