380256647 has 4 divisors (see below), whose sum is σ = 381495576. Its totient is φ = 379017720.

The previous prime is 380256641. The next prime is 380256719. The reversal of 380256647 is 746652083.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746652083 = 2243 ⋅332881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380256647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380256641) 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 3 ways as a sum of consecutive naturals, for example, 619004 + ... + 619617.

It is an arithmetic number, because the mean of its divisors is an integer number (95373894).

Almost surely, 2^380256647 is an apocalyptic number.

380256647 is a deficient number, since it is larger than the sum of its proper divisors (1238929).

380256647 is a wasteful number, since it uses less digits than its factorization.

380256647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238928.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 380256647 is about 19500.1704351526. The cubic root of 380256647 is about 724.4786720660.

The spelling of 380256647 in words is "three hundred eighty million, two hundred fifty-six thousand, six hundred forty-seven".