422987994 has 240 divisors, whose sum is σ = 1211142240. Its totient is φ = 108475200.

The previous prime is 422987927. The next prime is 422988001. The reversal of 422987994 is 499789224.

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

It is a self number, because there is not a number n which added to its sum of digits gives 422987994.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 13644759 + ... + 13644789.

It is an arithmetic number, because the mean of its divisors is an integer number (5046426).

Almost surely, 2^422987994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422987994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605571120).

422987994 is an abundant number, since it is smaller than the sum of its proper divisors (788154246).

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

422987994 is a wasteful number, since it uses less digits than its factorization.

422987994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 79 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 422987994 is about 20566.6719232840. The cubic root of 422987994 is about 750.6589728368.

The spelling of 422987994 in words is "four hundred twenty-two million, nine hundred eighty-seven thousand, nine hundred ninety-four".