422639724 has 48 divisors (see below), whose sum is σ = 1117921280. Its totient is φ = 123197760.

The previous prime is 422639719. The next prime is 422639747. The reversal of 422639724 is 427936224.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68332 + ... + 74259.

Almost surely, 2^422639724 is an apocalyptic number.

It is an amenable number.

422639724 is an abundant number, since it is smaller than the sum of its proper divisors (695281556).

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

422639724 is a wasteful number, since it uses less digits than its factorization.

422639724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142630 (or 142628 counting only the distinct ones).

The product of its digits is 145152, while the sum is 39.

The square root of 422639724 is about 20558.2033261664. The cubic root of 422639724 is about 750.4528962361.

It can be divided in two parts, 422 and 639724, that added together give a triangular number (640146 = T₁₁₃₁).

The spelling of 422639724 in words is "four hundred twenty-two million, six hundred thirty-nine thousand, seven hundred twenty-four".