431378 has 4 divisors (see below), whose sum is σ = 647070. Its totient is φ = 215688.

The previous prime is 431377. The next prime is 431381. The reversal of 431378 is 873134.

431378 is nontrivially palindromic in base 7.

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

It can be written as a sum of positive squares in only one way, i.e., 418609 + 12769 = 647^2 + 113^2 .

It is not an unprimeable number, because it can be changed into a prime (431377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107843 + ... + 107846.

2⁴³¹³⁷⁸ is an apocalyptic number.

431378 is a deficient number, since it is larger than the sum of its proper divisors (215692).

431378 is a wasteful number, since it uses less digits than its factorization.

431378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215691.

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

The square root of 431378 is about 656.7937271320. The cubic root of 431378 is about 75.5589645072.

The spelling of 431378 in words is "four hundred thirty-one thousand, three hundred seventy-eight".