878222407 has 4 divisors (see below), whose sum is σ = 879968880. Its totient is φ = 876475936.

The previous prime is 878222377. The next prime is 878222437. The reversal of 878222407 is 704222878.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (878222377) and next prime (878222437).

It is a cyclic number.

It is not a de Polignac number, because 878222407 - 2¹⁹ = 877698119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 878222407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878222437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872482 + ... + 873487.

It is an arithmetic number, because the mean of its divisors is an integer number (219992220).

Almost surely, 2^878222407 is an apocalyptic number.

878222407 is a deficient number, since it is larger than the sum of its proper divisors (1746473).

878222407 is a wasteful number, since it uses less digits than its factorization.

878222407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746472.

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 878222407 is about 29634.8174787698. The cubic root of 878222407 is about 957.6382944633.

The spelling of 878222407 in words is "eight hundred seventy-eight million, two hundred twenty-two thousand, four hundred seven".