420918650 has 12 divisors (see below), whose sum is σ = 782908782. Its totient is φ = 168367440.

The previous prime is 420918637. The next prime is 420918683. The reversal of 420918650 is 56819024.

It can be written as a sum of positive squares in 3 ways, for example, as 221741881 + 199176769 = 14891^2 + 14113^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 420918650.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4209137 + ... + 4209236.

Almost surely, 2^420918650 is an apocalyptic number.

420918650 is a deficient number, since it is larger than the sum of its proper divisors (361990132).

420918650 is a wasteful number, since it uses less digits than its factorization.

420918650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418385 (or 8418380 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 420918650 is about 20516.3020547076. The cubic root of 420918650 is about 749.4328452962.

The spelling of 420918650 in words is "four hundred twenty million, nine hundred eighteen thousand, six hundred fifty".