380644739 has 8 divisors (see below), whose sum is σ = 403422768. Its totient is φ = 357909760.

The previous prime is 380644717. The next prime is 380644751. The reversal of 380644739 is 937446083.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 380644739 - 2⁸ = 380644483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 380644739.

It is not an unprimeable number, because it can be changed into a prime (380644769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8444 + ... + 28854.

It is an arithmetic number, because the mean of its divisors is an integer number (50427846).

Almost surely, 2^380644739 is an apocalyptic number.

380644739 is a deficient number, since it is larger than the sum of its proper divisors (22778029).

380644739 is a wasteful number, since it uses less digits than its factorization.

380644739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21525.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 380644739 is about 19510.1188873876. The cubic root of 380644739 is about 724.7250572207.

The spelling of 380644739 in words is "three hundred eighty million, six hundred forty-four thousand, seven hundred thirty-nine".