420648682 has 4 divisors (see below), whose sum is σ = 630973026. Its totient is φ = 210324340.

The previous prime is 420648677. The next prime is 420648749. The reversal of 420648682 is 286846024.

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., 416200801 + 4447881 = 20401^2 + 2109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105162169 + ... + 105162172.

Almost surely, 2^420648682 is an apocalyptic number.

420648682 is a deficient number, since it is larger than the sum of its proper divisors (210324344).

420648682 is a wasteful number, since it uses less digits than its factorization.

420648682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210324343.

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 420648682 is about 20509.7216460877. The cubic root of 420648682 is about 749.2725877604.

The spelling of 420648682 in words is "four hundred twenty million, six hundred forty-eight thousand, six hundred eighty-two".