381403478 has 8 divisors (see below), whose sum is σ = 590560320. Its totient is φ = 184550040.

The previous prime is 381403471. The next prime is 381403481. The reversal of 381403478 is 874304183.

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

It is a super-2 number, since 2×381403478² = 290937226060992968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381403471) 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, 3075773 + ... + 3075896.

It is an arithmetic number, because the mean of its divisors is an integer number (73820040).

Almost surely, 2^381403478 is an apocalyptic number.

381403478 is a deficient number, since it is larger than the sum of its proper divisors (209156842).

381403478 is a wasteful number, since it uses less digits than its factorization.

381403478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151702.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 381403478 is about 19529.5539631606. The cubic root of 381403478 is about 725.2062690142.

The spelling of 381403478 in words is "three hundred eighty-one million, four hundred three thousand, four hundred seventy-eight".