420375656 has 8 divisors (see below), whose sum is σ = 788204370. Its totient is φ = 210187824.

The previous prime is 420375653. The next prime is 420375673. The reversal of 420375656 is 656573024.

It can be written as a sum of positive squares in only one way, i.e., 369024100 + 51351556 = 19210^2 + 7166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (420375653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26273471 + ... + 26273486.

Almost surely, 2^420375656 is an apocalyptic number.

It is an amenable number.

420375656 is a deficient number, since it is larger than the sum of its proper divisors (367828714).

420375656 is a wasteful number, since it uses less digits than its factorization.

420375656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52546963 (or 52546959 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 38.

The square root of 420375656 is about 20503.0645514274. The cubic root of 420375656 is about 749.1104451920.

The spelling of 420375656 in words is "four hundred twenty million, three hundred seventy-five thousand, six hundred fifty-six".