378431 has 4 divisors (see below), whose sum is σ = 380352. Its totient is φ = 376512.

The previous prime is 378407. The next prime is 378439. The reversal of 378431 is 134873.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378431 is a prime.

It is a super-2 number, since 2×378431² = 286420043522, 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 378431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (95088).

2³⁷⁸⁴³¹ is an apocalyptic number.

378431 is a deficient number, since it is larger than the sum of its proper divisors (1921).

378431 is a wasteful number, since it uses less digits than its factorization.

378431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920.

The product of its digits is 2016, while the sum is 26.

The square root of 378431 is about 615.1674568766. The cubic root of 378431 is about 72.3317382099.

The spelling of 378431 in words is "three hundred seventy-eight thousand, four hundred thirty-one".