380231820 has 96 divisors (see below), whose sum is σ = 1197685440. Its totient is φ = 101383488.

The previous prime is 380231807. The next prime is 380231899. The reversal of 380231820 is 28132083.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 31 ways as a sum of consecutive naturals, for example, 39394 + ... + 48086.

It is an arithmetic number, because the mean of its divisors is an integer number (12475890).

Almost surely, 2^380231820 is an apocalyptic number.

380231820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380231820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598842720).

380231820 is an abundant number, since it is smaller than the sum of its proper divisors (817453620).

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

380231820 is an equidigital number, since it uses as much as digits as its factorization.

380231820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8723 (or 8703 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 380231820 is about 19499.5338405819. The cubic root of 380231820 is about 724.4629046244.

The spelling of 380231820 in words is "three hundred eighty million, two hundred thirty-one thousand, eight hundred twenty".