381030644 has 12 divisors (see below), whose sum is σ = 677735268. Its totient is φ = 187392000.

The previous prime is 381030631. The next prime is 381030649. The reversal of 381030644 is 446030183.

It can be written as a sum of positive squares in 2 ways, for example, as 212809744 + 168220900 = 14588^2 + 12970^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381030649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780557 + ... + 781044.

It is an arithmetic number, because the mean of its divisors is an integer number (56477939).

Almost surely, 2^381030644 is an apocalyptic number.

It is an amenable number.

381030644 is a deficient number, since it is larger than the sum of its proper divisors (296704624).

381030644 is a wasteful number, since it uses less digits than its factorization.

381030644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561666 (or 1561664 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 381030644 is about 19520.0062499990. The cubic root of 381030644 is about 724.9698879289.

The spelling of 381030644 in words is "three hundred eighty-one million, thirty thousand, six hundred forty-four".