381747645 has 24 divisors (see below), whose sum is σ = 667888416. Its totient is φ = 201693408.

The previous prime is 381747607. The next prime is 381747659. The reversal of 381747645 is 546747183.

It is not a de Polignac number, because 381747645 - 2¹⁶ = 381682109 is a prime.

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 Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 381747645.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 34827 + ... + 44456.

It is an arithmetic number, because the mean of its divisors is an integer number (27828684).

Almost surely, 2^381747645 is an apocalyptic number.

It is an amenable number.

381747645 is a deficient number, since it is larger than the sum of its proper divisors (286140771).

381747645 is a wasteful number, since it uses less digits than its factorization.

381747645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79401 (or 79398 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 381747645 is about 19538.3634166222. The cubic root of 381747645 is about 725.4243381922.

The spelling of 381747645 in words is "three hundred eighty-one million, seven hundred forty-seven thousand, six hundred forty-five".