422658978 has 16 divisors (see below), whose sum is σ = 966077760. Its totient is φ = 120759696.

The previous prime is 422658959. The next prime is 422658989. The reversal of 422658978 is 879856224.

It is a super-2 number, since 2×422658978² = 357281223368008968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 422658978.

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, 5031613 + ... + 5031696.

It is an arithmetic number, because the mean of its divisors is an integer number (60379860).

Almost surely, 2^422658978 is an apocalyptic number.

422658978 is an abundant number, since it is smaller than the sum of its proper divisors (543418782).

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

422658978 is a wasteful number, since it uses less digits than its factorization.

422658978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10063321.

The product of its digits is 1935360, while the sum is 51.

The square root of 422658978 is about 20558.6716010544. The cubic root of 422658978 is about 750.4642920734.

The spelling of 422658978 in words is "four hundred twenty-two million, six hundred fifty-eight thousand, nine hundred seventy-eight".