631073628 has 72 divisors (see below), whose sum is σ = 1648719072. Its totient is φ = 203375232.

The previous prime is 631073621. The next prime is 631073659. The reversal of 631073628 is 826370136.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 631073592 and 631073601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631073621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221026 + ... + 223862.

It is an arithmetic number, because the mean of its divisors is an integer number (22898876).

Almost surely, 2^631073628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631073628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824359536).

631073628 is an abundant number, since it is smaller than the sum of its proper divisors (1017645444).

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

631073628 is a wasteful number, since it uses less digits than its factorization.

631073628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3051 (or 3046 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 631073628 is about 25121.1788736118. The cubic root of 631073628 is about 857.7485856029.

The spelling of 631073628 in words is "six hundred thirty-one million, seventy-three thousand, six hundred twenty-eight".