445770394 has 4 divisors (see below), whose sum is σ = 668655594. Its totient is φ = 222885196.

The previous prime is 445770389. The next prime is 445770401. The reversal of 445770394 is 493077544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 401481369 + 44289025 = 20037^2 + 6655^2 .

It is a super-2 number, since 2×445770394² = 397422488333830472, 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 445770394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111442597 + ... + 111442600.

Almost surely, 2^445770394 is an apocalyptic number.

445770394 is a deficient number, since it is larger than the sum of its proper divisors (222885200).

445770394 is a wasteful number, since it uses less digits than its factorization.

445770394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222885199.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 445770394 is about 21113.2753025200. The cubic root of 445770394 is about 763.9009915740.

The spelling of 445770394 in words is "four hundred forty-five million, seven hundred seventy thousand, three hundred ninety-four".