420727616 has 28 divisors (see below), whose sum is σ = 846327492. Its totient is φ = 207479808.

The previous prime is 420727603. The next prime is 420727627. The reversal of 420727616 is 616727024.

It can be written as a sum of positive squares in 2 ways, for example, as 227406400 + 193321216 = 15080^2 + 13904^2 .

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, 40355 + ... + 49698.

Almost surely, 2^420727616 is an apocalyptic number.

It is an amenable number.

420727616 is an abundant number, since it is smaller than the sum of its proper divisors (425599876).

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

420727616 is an equidigital number, since it uses as much as digits as its factorization.

420727616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90138 (or 90128 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 420727616 is about 20511.6458627776. The cubic root of 420727616 is about 749.3194513990.

The spelling of 420727616 in words is "four hundred twenty million, seven hundred twenty-seven thousand, six hundred sixteen".