381000730 has 32 divisors (see below), whose sum is σ = 787527360. Its totient is φ = 131253120.

The previous prime is 381000713. The next prime is 381000731. The reversal of 381000730 is 37000183.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (381000731) 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, 89059 + ... + 93238.

It is an arithmetic number, because the mean of its divisors is an integer number (24610230).

Almost surely, 2^381000730 is an apocalyptic number.

381000730 is an abundant number, since it is smaller than the sum of its proper divisors (406526630).

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

381000730 is a wasteful number, since it uses less digits than its factorization.

381000730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182334.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 381000730 is about 19519.2399954506. The cubic root of 381000730 is about 724.9509154244.

The spelling of 381000730 in words is "three hundred eighty-one million, seven hundred thirty", and thus it is an aban number.