421944724 has 24 divisors (see below), whose sum is σ = 757500128. Its totient is φ = 205541280.

The previous prime is 421944703. The next prime is 421944737. The reversal of 421944724 is 427449124.

It is a happy number.

It is a super-2 number, since 2×421944724² = 356074700222872352, which contains 22 as substring.

It is a congruent number.

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, 69499 + ... + 75325.

Almost surely, 2^421944724 is an apocalyptic number.

It is an amenable number.

421944724 is a deficient number, since it is larger than the sum of its proper divisors (335555404).

421944724 is a wasteful number, since it uses less digits than its factorization.

421944724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6295 (or 6293 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 421944724 is about 20541.2931433247. The cubic root of 421944724 is about 750.0413156499.

The spelling of 421944724 in words is "four hundred twenty-one million, nine hundred forty-four thousand, seven hundred twenty-four".