421390894 has 8 divisors (see below), whose sum is σ = 640745280. Its totient is φ = 207809136.

The previous prime is 421390877. The next prime is 421390897. The reversal of 421390894 is 498093124.

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

It is a super-2 number, since 2×421390894² = 355140571092238472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421390897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442974 + ... + 1443265.

It is an arithmetic number, because the mean of its divisors is an integer number (80093160).

Almost surely, 2^421390894 is an apocalyptic number.

421390894 is a deficient number, since it is larger than the sum of its proper divisors (219354386).

421390894 is a wasteful number, since it uses less digits than its factorization.

421390894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886314.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 421390894 is about 20527.8078225611. The cubic root of 421390894 is about 749.7130125687.

The spelling of 421390894 in words is "four hundred twenty-one million, three hundred ninety thousand, eight hundred ninety-four".