420844874 has 4 divisors (see below), whose sum is σ = 631267314. Its totient is φ = 210422436.

The previous prime is 420844867. The next prime is 420844891. The reversal of 420844874 is 478448024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 316662025 + 104182849 = 17795^2 + 10207^2 .

It is a super-2 number, since 2×420844874² = 354220815944151752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105211217 + ... + 105211220.

Almost surely, 2^420844874 is an apocalyptic number.

420844874 is a deficient number, since it is larger than the sum of its proper divisors (210422440).

420844874 is a wasteful number, since it uses less digits than its factorization.

420844874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210422439.

The product of its (nonzero) digits is 229376, while the sum is 41.

The square root of 420844874 is about 20514.5039910791. The cubic root of 420844874 is about 749.3890574303.

The spelling of 420844874 in words is "four hundred twenty million, eight hundred forty-four thousand, eight hundred seventy-four".