378961731 has 12 divisors (see below), whose sum is σ = 571189008. Its totient is φ = 241656624.

The previous prime is 378961703. The next prime is 378961741. The reversal of 378961731 is 137169873.

It is not a de Polignac number, because 378961731 - 2¹⁰ = 378960707 is a prime.

It is a super-2 number, since 2×378961731² = 287223987125032722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (378961741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 915160 + ... + 915573.

It is an arithmetic number, because the mean of its divisors is an integer number (47599084).

Almost surely, 2^378961731 is an apocalyptic number.

378961731 is a deficient number, since it is larger than the sum of its proper divisors (192227277).

378961731 is a wasteful number, since it uses less digits than its factorization.

378961731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830762 (or 1830759 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 378961731 is about 19466.9394358744. The cubic root of 378961731 is about 723.6553632512.

The spelling of 378961731 in words is "three hundred seventy-eight million, nine hundred sixty-one thousand, seven hundred thirty-one".