730512 has 80 divisors (see below), whose sum is σ = 2232000. Its totient is φ = 228096.

The previous prime is 730487. The next prime is 730537. The reversal of 730512 is 215037.

It is an interprime number because it is at equal distance from previous prime (730487) and next prime (730537).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

730512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8164 + ... + 8252.

It is an arithmetic number, because the mean of its divisors is an integer number (27900).

2⁷³⁰⁵¹² is an apocalyptic number.

730512 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 730512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1116000).

730512 is an abundant number, since it is smaller than the sum of its proper divisors (1501488).

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

730512 is a wasteful number, since it uses less digits than its factorization.

730512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 730512 is about 854.6999473499. The cubic root of 730512 is about 90.0621792539.

Adding to 730512 its reverse (215037), we get a palindrome (945549).

The spelling of 730512 in words is "seven hundred thirty thousand, five hundred twelve".