442272388 has 12 divisors (see below), whose sum is σ = 800665740. Its totient is φ = 213510752.

The previous prime is 442272283. The next prime is 442272401. The reversal of 442272388 is 883272244.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118200384 + 324072004 = 10872^2 + 18002^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442272388.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1906231 + ... + 1906462.

It is an arithmetic number, because the mean of its divisors is an integer number (66722145).

Almost surely, 2^442272388 is an apocalyptic number.

It is an amenable number.

442272388 is a deficient number, since it is larger than the sum of its proper divisors (358393352).

442272388 is a wasteful number, since it uses less digits than its factorization.

442272388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812726 (or 3812724 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

The square root of 442272388 is about 21030.2731318450. The cubic root of 442272388 is about 761.8976056662.

The spelling of 442272388 in words is "four hundred forty-two million, two hundred seventy-two thousand, three hundred eighty-eight".