381766368 has 24 divisors (see below), whose sum is σ = 1002136968. Its totient is φ = 127255424.

The previous prime is 381766349. The next prime is 381766369. The reversal of 381766368 is 863667183.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×381766368² = 291491119471822848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381766369) 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, 1988271 + ... + 1988462.

It is an arithmetic number, because the mean of its divisors is an integer number (41755707).

Almost surely, 2^381766368 is an apocalyptic number.

It is an amenable number.

381766368 is an abundant number, since it is smaller than the sum of its proper divisors (620370600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381766368 is a wasteful number, since it uses less digits than its factorization.

381766368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976746 (or 3976738 counting only the distinct ones).

The product of its digits is 870912, while the sum is 48.

The square root of 381766368 is about 19538.8425450434. The cubic root of 381766368 is about 725.4361975955.

It can be divided in two parts, 38176 and 6368, that added together give a palindrome (44544).

The spelling of 381766368 in words is "three hundred eighty-one million, seven hundred sixty-six thousand, three hundred sixty-eight".