731493136 has 160 divisors (see below), whose sum is σ = 1721139840. Its totient is φ = 297369600.

The previous prime is 731493083. The next prime is 731493197. The reversal of 731493136 is 631394137.

It is a super-2 number, since 2×731493136² = 1070164416030228992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 731493095 and 731493104.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8218980 + ... + 8219068.

It is an arithmetic number, because the mean of its divisors is an integer number (10757124).

Almost surely, 2^731493136 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 731493136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860569920).

731493136 is an abundant number, since it is smaller than the sum of its proper divisors (989646704).

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

731493136 is a wasteful number, since it uses less digits than its factorization.

731493136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 731493136 is about 27046.1297785838. The cubic root of 731493136 is about 901.0248145114.

The spelling of 731493136 in words is "seven hundred thirty-one million, four hundred ninety-three thousand, one hundred thirty-six".