420660356 has 12 divisors (see below), whose sum is σ = 736303260. Its totient is φ = 210288000.

The previous prime is 420660353. The next prime is 420660367. The reversal of 420660356 is 653066024.

It can be written as a sum of positive squares in 2 ways, for example, as 5152900 + 415507456 = 2270^2 + 20384^2 .

It is a super-2 number, since 2×420660356² = 353910270220093472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (420660353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25856 + ... + 38856.

It is an arithmetic number, because the mean of its divisors is an integer number (61358605).

Almost surely, 2^420660356 is an apocalyptic number.

It is an amenable number.

420660356 is a deficient number, since it is larger than the sum of its proper divisors (315642904).

420660356 is a wasteful number, since it uses less digits than its factorization.

420660356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21094 (or 21092 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 420660356 is about 20510.0062408572. The cubic root of 420660356 is about 749.2795190609.

The spelling of 420660356 in words is "four hundred twenty million, six hundred sixty thousand, three hundred fifty-six".