420563720 has 16 divisors (see below), whose sum is σ = 946268460. Its totient is φ = 168225472.

The previous prime is 420563711. The next prime is 420563761. The reversal of 420563720 is 27365024.

It can be written as a sum of positive squares in 2 ways, for example, as 405055876 + 15507844 = 20126^2 + 3938^2 .

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, 5257007 + ... + 5257086.

Almost surely, 2^420563720 is an apocalyptic number.

420563720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420563720 is an abundant number, since it is smaller than the sum of its proper divisors (525704740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420563720 is a wasteful number, since it uses less digits than its factorization.

420563720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10514104 (or 10514100 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 420563720 is about 20507.6502798346. The cubic root of 420563720 is about 749.2221387065. Note that the first 3 decimals are identical.

The spelling of 420563720 in words is "four hundred twenty million, five hundred sixty-three thousand, seven hundred twenty".