381843655 has 16 divisors (see below), whose sum is σ = 475310880. Its totient is φ = 294271488.

The previous prime is 381843599. The next prime is 381843659. The reversal of 381843655 is 556348183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381843655 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381843659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3531 + ... + 27859.

It is an arithmetic number, because the mean of its divisors is an integer number (29706930).

Almost surely, 2^381843655 is an apocalyptic number.

381843655 is a deficient number, since it is larger than the sum of its proper divisors (93467225).

381843655 is a wasteful number, since it uses less digits than its factorization.

381843655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450.

The product of its digits is 345600, while the sum is 43.

The square root of 381843655 is about 19540.8202233171. The cubic root of 381843655 is about 725.4851481309.

The spelling of 381843655 in words is "three hundred eighty-one million, eight hundred forty-three thousand, six hundred fifty-five".