631478 has 4 divisors (see below), whose sum is σ = 947220. Its totient is φ = 315738.

The previous prime is 631471. The next prime is 631483. The reversal of 631478 is 874136.

631478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 631478.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 631478.

It is not an unprimeable number, because it can be changed into a prime (631471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157868 + ... + 157871.

It is an arithmetic number, because the mean of its divisors is an integer number (236805).

2⁶³¹⁴⁷⁸ is an apocalyptic number.

631478 is a deficient number, since it is larger than the sum of its proper divisors (315742).

631478 is a wasteful number, since it uses less digits than its factorization.

631478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315741.

The product of its digits is 4032, while the sum is 29.

The square root of 631478 is about 794.6559003745. The cubic root of 631478 is about 85.7931752531.

The spelling of 631478 in words is "six hundred thirty-one thousand, four hundred seventy-eight".