3644839442 has 8 divisors (see below), whose sum is σ = 5467600332. Its totient is φ = 1822306000.

The previous prime is 3644839409. The next prime is 3644839447. The reversal of 3644839442 is 2449384463.

It can be written as a sum of positive squares in 2 ways, for example, as 3572572441 + 72267001 = 59771^2 + 8501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3644839447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609 + ... + 85812.

Almost surely, 2^3644839442 is an apocalyptic number.

3644839442 is a deficient number, since it is larger than the sum of its proper divisors (1822760890).

3644839442 is a wasteful number, since it uses less digits than its factorization.

3644839442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113724.

The product of its digits is 1990656, while the sum is 47.

The square root of 3644839442 is about 60372.5056793239. The cubic root of 3644839442 is about 1538.9557549432.

The spelling of 3644839442 in words is "three billion, six hundred forty-four million, eight hundred thirty-nine thousand, four hundred forty-two".