421438894 has 8 divisors (see below), whose sum is σ = 634316760. Its totient is φ = 209999976.

The previous prime is 421438883. The next prime is 421438909. The reversal of 421438894 is 498834124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×421438894² = 355221482751886472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421438894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359004 + ... + 360175.

It is an arithmetic number, because the mean of its divisors is an integer number (79289595).

Almost surely, 2^421438894 is an apocalyptic number.

421438894 is a deficient number, since it is larger than the sum of its proper divisors (212877866).

421438894 is a wasteful number, since it uses less digits than its factorization.

421438894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719474.

The product of its digits is 221184, while the sum is 43.

The square root of 421438894 is about 20528.9769350545. The cubic root of 421438894 is about 749.7414777134.

The spelling of 421438894 in words is "four hundred twenty-one million, four hundred thirty-eight thousand, eight hundred ninety-four".