381323736 has 48 divisors (see below), whose sum is σ = 1093505400. Its totient is φ = 119630592.

The previous prime is 381323731. The next prime is 381323743. The reversal of 381323736 is 637323183.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 381323736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381323731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154546 + ... + 156993.

Almost surely, 2^381323736 is an apocalyptic number.

381323736 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

381323736 is an abundant number, since it is smaller than the sum of its proper divisors (712181664).

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

381323736 is a wasteful number, since it uses less digits than its factorization.

381323736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311568 (or 311561 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 381323736 is about 19527.5122839547. The cubic root of 381323736 is about 725.1557246149.

The spelling of 381323736 in words is "three hundred eighty-one million, three hundred twenty-three thousand, seven hundred thirty-six".