442121930 has 8 divisors (see below), whose sum is σ = 795819492. Its totient is φ = 176848768.

The previous prime is 442121929. The next prime is 442121951. The reversal of 442121930 is 39121244.

It can be written as a sum of positive squares in 2 ways, for example, as 404532769 + 37589161 = 20113^2 + 6131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 442121930.

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, 22106087 + ... + 22106106.

Almost surely, 2^442121930 is an apocalyptic number.

442121930 is a deficient number, since it is larger than the sum of its proper divisors (353697562).

442121930 is a wasteful number, since it uses less digits than its factorization.

442121930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44212200.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 442121930 is about 21026.6956510052. The cubic root of 442121930 is about 761.8111984394.

The spelling of 442121930 in words is "four hundred forty-two million, one hundred twenty-one thousand, nine hundred thirty".