731443020 has 384 divisors, whose sum is σ = 2763694080. Its totient is φ = 139898880.

The previous prime is 731442997. The next prime is 731443021. The reversal of 731443020 is 20344137.

It is not an unprimeable number, because it can be changed into a prime (731443021) 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 127 ways as a sum of consecutive naturals, for example, 5262111 + ... + 5262249.

It is an arithmetic number, because the mean of its divisors is an integer number (7197120).

Almost surely, 2^731443020 is an apocalyptic number.

731443020 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731443020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381847040).

731443020 is an abundant number, since it is smaller than the sum of its proper divisors (2032251060).

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

731443020 is a wasteful number, since it uses less digits than its factorization.

731443020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 731443020 is about 27045.2032715600. The cubic root of 731443020 is about 901.0042370612.

Adding to 731443020 its reverse (20344137), we get a palindrome (751787157).

The spelling of 731443020 in words is "seven hundred thirty-one million, four hundred forty-three thousand, twenty".