420271664 has 10 divisors (see below), whose sum is σ = 814276380. Its totient is φ = 210135824.

The previous prime is 420271661. The next prime is 420271669. The reversal of 420271664 is 466172024.

It is a super-2 number, since 2×420271664² = 353256543122657792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420271664.

It is not an unprimeable number, because it can be changed into a prime (420271661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13133474 + ... + 13133505.

It is an arithmetic number, because the mean of its divisors is an integer number (81427638).

Almost surely, 2^420271664 is an apocalyptic number.

It is an amenable number.

420271664 is a deficient number, since it is larger than the sum of its proper divisors (394004716).

420271664 is a wasteful number, since it uses less digits than its factorization.

420271664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26266987 (or 26266981 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 420271664 is about 20500.5283834344. The cubic root of 420271664 is about 749.0486687650.

The spelling of 420271664 in words is "four hundred twenty million, two hundred seventy-one thousand, six hundred sixty-four".