731296512 has 90 divisors (see below), whose sum is σ = 2180655708. Its totient is φ = 243758592.

The previous prime is 731296457. The next prime is 731296513. The reversal of 731296512 is 215692137.

It is a super-2 number, since 2×731296512² = 1069589176926732288, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (731296513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3103 + ... + 38369.

Almost surely, 2^731296512 is an apocalyptic number.

731296512 is a gapful number since it is divisible by the number (72) 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 731296512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090327854).

731296512 is an abundant number, since it is smaller than the sum of its proper divisors (1449359196).

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

731296512 is an equidigital number, since it uses as much as digits as its factorization.

731296512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35295 (or 35272 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 731296512 is about 27042.4945594891. The cubic root of 731296512 is about 900.9440760098.

The spelling of 731296512 in words is "seven hundred thirty-one million, two hundred ninety-six thousand, five hundred twelve".