442128707464 has 32 divisors (see below), whose sum is σ = 837987547320. Its totient is φ = 218667810816.

The previous prime is 442128707437. The next prime is 442128707473. The reversal of 442128707464 is 464707821244.

It can be written as a sum of positive squares in 4 ways, for example, as 205261551364 + 236867156100 = 453058^2 + 486690^2 .

It is a super-2 number, since 2×442128707464² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301352 + ... + 1605544.

Almost surely, 2^442128707464 is an apocalyptic number.

It is an amenable number.

442128707464 is a deficient number, since it is larger than the sum of its proper divisors (395858839856).

442128707464 is a wasteful number, since it uses less digits than its factorization.

442128707464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306169 (or 306165 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 49.

The spelling of 442128707464 in words is "four hundred forty-two billion, one hundred twenty-eight million, seven hundred seven thousand, four hundred sixty-four".