501421328 has 20 divisors (see below), whose sum is σ = 971985408. Its totient is φ = 250586400.

The previous prime is 501421309. The next prime is 501421337. The reversal of 501421328 is 823124105.

It is a junction number, because it is equal to n+sod(n) for n = 501421297 and 501421306.

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 3 ways as a sum of consecutive naturals, for example, 31553 + ... + 44703.

Almost surely, 2^501421328 is an apocalyptic number.

It is an amenable number.

501421328 is a deficient number, since it is larger than the sum of its proper divisors (470564080).

501421328 is a wasteful number, since it uses less digits than its factorization.

501421328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15542 (or 15536 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 501421328 is about 22392.4390810827. The cubic root of 501421328 is about 794.4518870004.

The spelling of 501421328 in words is "five hundred one million, four hundred twenty-one thousand, three hundred twenty-eight".