378631 has 4 divisors (see below), whose sum is σ = 413064. Its totient is φ = 344200.

The previous prime is 378629. The next prime is 378661. The reversal of 378631 is 136873.

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

It is a cyclic number.

It is not a de Polignac number, because 378631 - 2¹ = 378629 is a prime.

It is a super-2 number, since 2×378631² = 286722868322, 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 378631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378601) 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, 17200 + ... + 17221.

It is an arithmetic number, because the mean of its divisors is an integer number (103266).

2³⁷⁸⁶³¹ is an apocalyptic number.

378631 is a deficient number, since it is larger than the sum of its proper divisors (34433).

378631 is a wasteful number, since it uses less digits than its factorization.

378631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34432.

The product of its digits is 3024, while the sum is 28.

The square root of 378631 is about 615.3299927681. The cubic root of 378631 is about 72.3444783571.

It can be divided in two parts, 37 and 8631, that added together give a palindrome (8668).

The spelling of 378631 in words is "three hundred seventy-eight thousand, six hundred thirty-one".