381039330 has 32 divisors (see below), whose sum is σ = 1045137024. Its totient is φ = 87094656.

The previous prime is 381039311. The next prime is 381039331. The reversal of 381039330 is 33930183.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381039331) 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, 907027 + ... + 907446.

It is an arithmetic number, because the mean of its divisors is an integer number (32660532).

Almost surely, 2^381039330 is an apocalyptic number.

381039330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381039330 is an abundant number, since it is smaller than the sum of its proper divisors (664097694).

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

381039330 is a wasteful number, since it uses less digits than its factorization.

381039330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814490.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 381039330 is about 19520.2287384139. The cubic root of 381039330 is about 724.9753967077.

The spelling of 381039330 in words is "three hundred eighty-one million, thirty-nine thousand, three hundred thirty".