381278015 has 8 divisors (see below), whose sum is σ = 477426528. Its totient is φ = 291760480.

The previous prime is 381278011. The next prime is 381278017. The reversal of 381278015 is 510872183.

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

It is not a de Polignac number, because 381278015 - 2² = 381278011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381278011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1657616 + ... + 1657845.

It is an arithmetic number, because the mean of its divisors is an integer number (59678316).

Almost surely, 2^381278015 is an apocalyptic number.

381278015 is a deficient number, since it is larger than the sum of its proper divisors (96148513).

381278015 is a wasteful number, since it uses less digits than its factorization.

381278015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3315489.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 381278015 is about 19526.3415672266. The cubic root of 381278015 is about 725.1267412193.

The spelling of 381278015 in words is "three hundred eighty-one million, two hundred seventy-eight thousand, fifteen".