420891118 has 8 divisors (see below), whose sum is σ = 632388960. Its totient is φ = 210094800.

The previous prime is 420891109. The next prime is 420891131. The reversal of 420891118 is 811198024.

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

It is a super-2 number, since 2×420891118² = 354298666422579848, which contains 22 as substring.

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, 173878 + ... + 176281.

It is an arithmetic number, because the mean of its divisors is an integer number (79048620).

Almost surely, 2^420891118 is an apocalyptic number.

420891118 is a deficient number, since it is larger than the sum of its proper divisors (211497842).

420891118 is a wasteful number, since it uses less digits than its factorization.

420891118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350762.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 420891118 is about 20515.6310651172. The cubic root of 420891118 is about 749.4165049773.

The spelling of 420891118 in words is "four hundred twenty million, eight hundred ninety-one thousand, one hundred eighteen".