422403654978 has 42 divisors (see below), whose sum is σ = 950029467177. Its totient is φ = 140792946120.

The previous prime is 422403654973. The next prime is 422403655013. The reversal of 422403654978 is 879456304224.

It is a happy number.

422403654978 is a `hidden beast` number, since 4 + 2 + 24 + 0 + 3 + 6 + 549 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 281168244009 + 141235410969 = 530253^2 + 375813^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=459567.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (422403654973) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 24808108 + ... + 24825128.

Almost surely, 2^422403654978 is an apocalyptic number.

422403654978 is an abundant number, since it is smaller than the sum of its proper divisors (527625812199).

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

422403654978 is an frugal number, since it uses more digits than its factorization.

422403654978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34062 (or 17026 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 422403654978 in words is "four hundred twenty-two billion, four hundred three million, six hundred fifty-four thousand, nine hundred seventy-eight".