381643654 has 24 divisors (see below), whose sum is σ = 688897440. Its totient is φ = 157920336.

The previous prime is 381643651. The next prime is 381643679. The reversal of 381643654 is 456346183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381643651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64302 + ... + 69985.

It is an arithmetic number, because the mean of its divisors is an integer number (28704060).

Almost surely, 2^381643654 is an apocalyptic number.

381643654 is a deficient number, since it is larger than the sum of its proper divisors (307253786).

381643654 is a wasteful number, since it uses less digits than its factorization.

381643654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134332 (or 134325 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 381643654 is about 19535.7020349922. The cubic root of 381643654 is about 725.3584618169.

The spelling of 381643654 in words is "three hundred eighty-one million, six hundred forty-three thousand, six hundred fifty-four".