731043630 has 96 divisors (see below), whose sum is σ = 2004912000. Its totient is φ = 191603232.

The previous prime is 731043613. The next prime is 731043637. The reversal of 731043630 is 36340137.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 731043594 and 731043603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731043637) 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 47 ways as a sum of consecutive naturals, for example, 140821 + ... + 145919.

It is an arithmetic number, because the mean of its divisors is an integer number (20884500).

Almost surely, 2^731043630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731043630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002456000).

731043630 is an abundant number, since it is smaller than the sum of its proper divisors (1273868370).

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

731043630 is a wasteful number, since it uses less digits than its factorization.

731043630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180 (or 5168 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 731043630 is about 27037.8185140739. The cubic root of 731043630 is about 900.8402153539.

Adding to 731043630 its reverse (36340137), we get a palindrome (767383767).

The spelling of 731043630 in words is "seven hundred thirty-one million, forty-three thousand, six hundred thirty".