381694372 has 6 divisors (see below), whose sum is σ = 667965158. Its totient is φ = 190847184.

The previous prime is 381694349. The next prime is 381694373. The reversal of 381694372 is 273496183.

It can be written as a sum of positive squares in only one way, i.e., 217444516 + 164249856 = 14746^2 + 12816^2 .

It is not an unprimeable number, because it can be changed into a prime (381694373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47711793 + ... + 47711800.

Almost surely, 2^381694372 is an apocalyptic number.

It is an amenable number.

381694372 is a deficient number, since it is larger than the sum of its proper divisors (286270786).

381694372 is a wasteful number, since it uses less digits than its factorization.

381694372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95423597 (or 95423595 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 381694372 is about 19537.0000767774. Note that the first 4 decimals coincide. The cubic root of 381694372 is about 725.3905922267.

The spelling of 381694372 in words is "three hundred eighty-one million, six hundred ninety-four thousand, three hundred seventy-two".