381601378 has 8 divisors (see below), whose sum is σ = 583202268. Its totient is φ = 187200624.

The previous prime is 381601369. The next prime is 381601379. The reversal of 381601378 is 873106183.

It can be written as a sum of positive squares in 2 ways, for example, as 375855769 + 5745609 = 19387^2 + 2397^2 .

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

It is a super-2 number, since 2×381601378² = 291239223382997768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381601379) 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, 1799901 + ... + 1800112.

Almost surely, 2^381601378 is an apocalyptic number.

381601378 is a deficient number, since it is larger than the sum of its proper divisors (201600890).

381601378 is a wasteful number, since it uses less digits than its factorization.

381601378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3600068.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 381601378 is about 19534.6199860658. The cubic root of 381601378 is about 725.3316773315.

The spelling of 381601378 in words is "three hundred eighty-one million, six hundred one thousand, three hundred seventy-eight".