444754638 has 48 divisors (see below), whose sum is σ = 1001669760. Its totient is φ = 147904056.

The previous prime is 444754637. The next prime is 444754693. The reversal of 444754638 is 836457444.

444754638 is a `hidden beast` number, since 4 + 4 + 4 + 7 + 5 + 4 + 638 = 666.

It is a super-2 number, since 2×444754638² = 395613376045022088, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 444754593 and 444754602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444754637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284503 + ... + 286061.

It is an arithmetic number, because the mean of its divisors is an integer number (20868120).

Almost surely, 2^444754638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444754638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500834880).

444754638 is an abundant number, since it is smaller than the sum of its proper divisors (556915122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

444754638 is a wasteful number, since it uses less digits than its factorization.

444754638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163 (or 2151 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 45.

The square root of 444754638 is about 21089.2066707119. The cubic root of 444754638 is about 763.3203285712.

The spelling of 444754638 in words is "four hundred forty-four million, seven hundred fifty-four thousand, six hundred thirty-eight".