420388843876 has 27 divisors (see below), whose sum is σ = 754156925977. Its totient is φ = 205041793760.

The previous prime is 420388843873. The next prime is 420388843907. The reversal of 420388843876 is 678348883024.

The square root of 420388843876 is 648374.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 20256690276 + 400132153600 = 142326^2 + 632560^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420388843871) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 53162715 + ... + 53170621.

Almost surely, 2^420388843876 is an apocalyptic number.

420388843876 is the 648374-th square number.

It is an amenable number.

420388843876 is a deficient number, since it is larger than the sum of its proper divisors (333768082101).

420388843876 is an frugal number, since it uses more digits than its factorization.

420388843876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900 (or 7950 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 61.

The spelling of 420388843876 in words is "four hundred twenty billion, three hundred eighty-eight million, eight hundred forty-three thousand, eight hundred seventy-six".