378715831 has 16 divisors (see below), whose sum is σ = 419850144. Its totient is φ = 339341184.

The previous prime is 378715829. The next prime is 378715879. The reversal of 378715831 is 138517873.

It is not a de Polignac number, because 378715831 - 2¹ = 378715829 is a prime.

It is a super-2 number, since 2×378715831² = 286851361300041122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378713831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325056 + ... + 326218.

It is an arithmetic number, because the mean of its divisors is an integer number (26240634).

Almost surely, 2^378715831 is an apocalyptic number.

378715831 is a deficient number, since it is larger than the sum of its proper divisors (41134313).

378715831 is a wasteful number, since it uses less digits than its factorization.

378715831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890.

The product of its digits is 141120, while the sum is 43.

The square root of 378715831 is about 19460.6225748304. The cubic root of 378715831 is about 723.4988079918.

The spelling of 378715831 in words is "three hundred seventy-eight million, seven hundred fifteen thousand, eight hundred thirty-one".