378631015 has 8 divisors (see below), whose sum is σ = 519265440. Its totient is φ = 259632672.

The previous prime is 378631007. The next prime is 378631049. The reversal of 378631015 is 510136873.

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

It is a cyclic number.

It is not a de Polignac number, because 378631015 - 2³ = 378631007 is a prime.

It is a super-2 number, since 2×378631015² = 286722891039860450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5408980 + ... + 5409049.

It is an arithmetic number, because the mean of its divisors is an integer number (64908180).

Almost surely, 2^378631015 is an apocalyptic number.

378631015 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

378631015 is a deficient number, since it is larger than the sum of its proper divisors (140634425).

378631015 is a wasteful number, since it uses less digits than its factorization.

378631015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10818041.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 378631015 is about 19458.4432830584. The cubic root of 378631015 is about 723.4447931242. Note that the first 3 decimals are identical.

Adding to 378631015 its reverse (510136873), we get a palindrome (888767888).

The spelling of 378631015 in words is "three hundred seventy-eight million, six hundred thirty-one thousand, fifteen".