631470 has 64 divisors (see below), whose sum is σ = 1806336. Its totient is φ = 138240.

The previous prime is 631469. The next prime is 631471. The reversal of 631470 is 74136.

631470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (631469) and next prime (631471).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

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 631470.

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 in 31 ways as a sum of consecutive naturals, for example, 6462 + ... + 6558.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2⁶³¹⁴⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903168).

631470 is an abundant number, since it is smaller than the sum of its proper divisors (1174866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631470 is a wasteful number, since it uses less digits than its factorization.

631470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 631470 is about 794.6508667333. The cubic root of 631470 is about 85.7928129558.

The spelling of 631470 in words is "six hundred thirty-one thousand, four hundred seventy".