421475390 has 32 divisors (see below), whose sum is σ = 918039744. Its totient is φ = 136005120.

The previous prime is 421475389. The next prime is 421475419. The reversal of 421475390 is 93574124.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 421475390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175901 + ... + 178280.

It is an arithmetic number, because the mean of its divisors is an integer number (28688742).

Almost surely, 2^421475390 is an apocalyptic number.

421475390 is an abundant number, since it is smaller than the sum of its proper divisors (496564354).

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

421475390 is a wasteful number, since it uses less digits than its factorization.

421475390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354212.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 421475390 is about 20529.8658056988. The cubic root of 421475390 is about 749.7631192653.

The spelling of 421475390 in words is "four hundred twenty-one million, four hundred seventy-five thousand, three hundred ninety".