378289931 has 8 divisors (see below), whose sum is σ = 392755584. Its totient is φ = 363965760.

The previous prime is 378289921. The next prime is 378289937. The reversal of 378289931 is 139982873.

It is a happy number.

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 378289931 - 2¹⁸ = 378027787 is a prime.

It is a super-2 number, since 2×378289931² = 286206543791969522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 378289931.

It is not an unprimeable number, because it can be changed into a prime (378289937) 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, 29906 + ... + 40631.

It is an arithmetic number, because the mean of its divisors is an integer number (49094448).

Almost surely, 2^378289931 is an apocalyptic number.

378289931 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

378289931 is a deficient number, since it is larger than the sum of its proper divisors (14465653).

378289931 is a wasteful number, since it uses less digits than its factorization.

378289931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70741.

The product of its digits is 653184, while the sum is 50.

The square root of 378289931 is about 19449.6768867763. The cubic root of 378289931 is about 723.2274931087.

The spelling of 378289931 in words is "three hundred seventy-eight million, two hundred eighty-nine thousand, nine hundred thirty-one".