444693987 has 12 divisors (see below), whose sum is σ = 642850104. Its totient is φ = 296225280.

The previous prime is 444693979. The next prime is 444694037. The reversal of 444693987 is 789396444.

It is a happy number.

It is not a de Polignac number, because 444693987 - 2³ = 444693979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (444693947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7518 + ... + 30755.

It is an arithmetic number, because the mean of its divisors is an integer number (53570842).

Almost surely, 2^444693987 is an apocalyptic number.

444693987 is a deficient number, since it is larger than the sum of its proper divisors (198156117).

444693987 is a wasteful number, since it uses less digits than its factorization.

444693987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39570 (or 39567 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 444693987 is about 21087.7686586324. The cubic root of 444693987 is about 763.2856291048.

It can be divided in two parts, 444 and 693987, that added together give a triangular number (694431 = T₁₁₇₈).

The spelling of 444693987 in words is "four hundred forty-four million, six hundred ninety-three thousand, nine hundred eighty-seven".