381305076 has 24 divisors (see below), whose sum is σ = 891582720. Its totient is φ = 126834432.

The previous prime is 381305009. The next prime is 381305077. The reversal of 381305076 is 670503183.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381305077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27421 + ... + 38916.

It is an arithmetic number, because the mean of its divisors is an integer number (37149280).

Almost surely, 2^381305076 is an apocalyptic number.

It is an amenable number.

381305076 is an abundant number, since it is smaller than the sum of its proper divisors (510277644).

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

381305076 is a wasteful number, since it uses less digits than its factorization.

381305076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66823 (or 66821 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 381305076 is about 19527.0344906747. The cubic root of 381305076 is about 725.1438959723.

The spelling of 381305076 in words is "three hundred eighty-one million, three hundred five thousand, seventy-six".