631378 has 12 divisors (see below), whose sum is σ = 1041390. Its totient is φ = 286880.

The previous prime is 631361. The next prime is 631387. The reversal of 631378 is 873136.

631378 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in only one way, i.e., 543169 + 88209 = 737^2 + 297^2 .

It is a d-powerful number, because it can be written as 6⁵ + 3¹⁰ + 3¹² + 1 + 7³ + 8⁵ .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1063 + ... + 1546.

2⁶³¹³⁷⁸ is an apocalyptic number.

631378 is a deficient number, since it is larger than the sum of its proper divisors (410012).

631378 is a wasteful number, since it uses less digits than its factorization.

631378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633 (or 2622 counting only the distinct ones).

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

The square root of 631378 is about 794.5929775678. The cubic root of 631378 is about 85.7886463171.

It can be divided in two parts, 63 and 1378, that added together give a palindrome (1441).

The spelling of 631378 in words is "six hundred thirty-one thousand, three hundred seventy-eight".