420662644 has 6 divisors (see below), whose sum is σ = 736159634. Its totient is φ = 210331320.

The previous prime is 420662639. The next prime is 420662681. The reversal of 420662644 is 446266024.

It can be written as a sum of positive squares in only one way, i.e., 414611044 + 6051600 = 20362^2 + 2460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52582827 + ... + 52582834.

Almost surely, 2^420662644 is an apocalyptic number.

It is an amenable number.

420662644 is a deficient number, since it is larger than the sum of its proper divisors (315496990).

420662644 is a wasteful number, since it uses less digits than its factorization.

420662644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105165665 (or 105165663 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 420662644 is about 20510.0620184338. The cubic root of 420662644 is about 749.2808775190.

The spelling of 420662644 in words is "four hundred twenty million, six hundred sixty-two thousand, six hundred forty-four".