421831790 has 16 divisors (see below), whose sum is σ = 765095760. Its totient is φ = 167444160.

The previous prime is 421831789. The next prime is 421831793. The reversal of 421831790 is 97138124.

It is a self number, because there is not a number n which added to its sum of digits gives 421831790.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421831793) by changing a digit.

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, 159695 + ... + 162314.

It is an arithmetic number, because the mean of its divisors is an integer number (47818485).

Almost surely, 2^421831790 is an apocalyptic number.

421831790 is a deficient number, since it is larger than the sum of its proper divisors (343263970).

421831790 is a wasteful number, since it uses less digits than its factorization.

421831790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322147.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 421831790 is about 20538.5440087656. The cubic root of 421831790 is about 749.9743931998.

The spelling of 421831790 in words is "four hundred twenty-one million, eight hundred thirty-one thousand, seven hundred ninety".