421073990 has 16 divisors (see below), whose sum is σ = 759105648. Its totient is φ = 168169056.

The previous prime is 421073963. The next prime is 421073999. The reversal of 421073990 is 99370124.

It is a self number, because there is not a number n which added to its sum of digits gives 421073990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421073999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25712 + ... + 38771.

It is an arithmetic number, because the mean of its divisors is an integer number (47444103).

Almost surely, 2^421073990 is an apocalyptic number.

421073990 is a deficient number, since it is larger than the sum of its proper divisors (338031658).

421073990 is a wasteful number, since it uses less digits than its factorization.

421073990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65143.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 421073990 is about 20520.0874754471. The cubic root of 421073990 is about 749.5250266714.

The spelling of 421073990 in words is "four hundred twenty-one million, seventy-three thousand, nine hundred ninety".