442756690 has 16 divisors (see below), whose sum is σ = 800476992. Its totient is φ = 176321584.

The previous prime is 442756673. The next prime is 442756711. The reversal of 442756690 is 96657244.

It is a happy number.

It is a super-2 number, since 2×442756690² = 392066973079512200, which 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, 95254 + ... + 99793.

It is an arithmetic number, because the mean of its divisors is an integer number (50029812).

Almost surely, 2^442756690 is an apocalyptic number.

442756690 is a deficient number, since it is larger than the sum of its proper divisors (357720302).

442756690 is a wasteful number, since it uses less digits than its factorization.

442756690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195281.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 442756690 is about 21041.7843825090. The cubic root of 442756690 is about 762.1756047315.

The spelling of 442756690 in words is "four hundred forty-two million, seven hundred fifty-six thousand, six hundred ninety".