421917768 has 32 divisors (see below), whose sum is σ = 1171994400. Its totient is φ = 140639184.

The previous prime is 421917739. The next prime is 421917817. The reversal of 421917768 is 867719124.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976446 + ... + 976877.

It is an arithmetic number, because the mean of its divisors is an integer number (36624825).

Almost surely, 2^421917768 is an apocalyptic number.

It is an amenable number.

421917768 is an abundant number, since it is smaller than the sum of its proper divisors (750076632).

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

421917768 is a wasteful number, since it uses less digits than its factorization.

421917768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953338 (or 1953328 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 421917768 is about 20540.6369910965. The cubic root of 421917768 is about 750.0253431436.

The spelling of 421917768 in words is "four hundred twenty-one million, nine hundred seventeen thousand, seven hundred sixty-eight".