381645494 has 8 divisors (see below), whose sum is σ = 572572560. Its totient is φ = 190787976.

The previous prime is 381645487. The next prime is 381645503. The reversal of 381645494 is 494546183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×381645494³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314 + ... + 27629.

It is an arithmetic number, because the mean of its divisors is an integer number (71571570).

Almost surely, 2^381645494 is an apocalyptic number.

381645494 is a deficient number, since it is larger than the sum of its proper divisors (190927066).

381645494 is a wasteful number, since it uses less digits than its factorization.

381645494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34774.

The product of its digits is 414720, while the sum is 44.

The square root of 381645494 is about 19535.7491282008. The cubic root of 381645494 is about 725.3596275269.

The spelling of 381645494 in words is "three hundred eighty-one million, six hundred forty-five thousand, four hundred ninety-four".