381517972 has 12 divisors (see below), whose sum is σ = 728352576. Its totient is φ = 173417240.

The previous prime is 381517957. The next prime is 381517987. The reversal of 381517972 is 279715183.

It is an interprime number because it is at equal distance from previous prime (381517957) and next prime (381517987).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4335388 + ... + 4335475.

It is an arithmetic number, because the mean of its divisors is an integer number (60696048).

Almost surely, 2^381517972 is an apocalyptic number.

It is an amenable number.

381517972 is a deficient number, since it is larger than the sum of its proper divisors (346834604).

381517972 is a wasteful number, since it uses less digits than its factorization.

381517972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8670878 (or 8670876 counting only the distinct ones).

The product of its digits is 105840, while the sum is 43.

The square root of 381517972 is about 19532.4850441514. The cubic root of 381517972 is about 725.2788286212.

The spelling of 381517972 in words is "three hundred eighty-one million, five hundred seventeen thousand, nine hundred seventy-two".