382400644 has 6 divisors (see below), whose sum is σ = 669201134. Its totient is φ = 191200320.

The previous prime is 382400639. The next prime is 382400647. The reversal of 382400644 is 446004283.

It can be written as a sum of positive squares in only one way, i.e., 355775044 + 26625600 = 18862^2 + 5160^2 .

It is a super-2 number, since 2×382400644² = 292460505063229472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (382400647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47800077 + ... + 47800084.

Almost surely, 2^382400644 is an apocalyptic number.

It is an amenable number.

382400644 is a deficient number, since it is larger than the sum of its proper divisors (286800490).

382400644 is a wasteful number, since it uses less digits than its factorization.

382400644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95600165 (or 95600163 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 382400644 is about 19555.0669648559. The cubic root of 382400644 is about 725.8377277993.

The spelling of 382400644 in words is "three hundred eighty-two million, four hundred thousand, six hundred forty-four".