730242040 has 128 divisors (see below), whose sum is σ = 1871424000. Its totient is φ = 254016000.

The previous prime is 730242017. The next prime is 730242049. The reversal of 730242040 is 40242037.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730242049) 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 31 ways as a sum of consecutive naturals, for example, 1926571 + ... + 1926949.

It is an arithmetic number, because the mean of its divisors is an integer number (14620500).

Almost surely, 2^730242040 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 730242040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935712000).

730242040 is an abundant number, since it is smaller than the sum of its proper divisors (1141181960).

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

730242040 is a wasteful number, since it uses less digits than its factorization.

730242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 730242040 is about 27022.9909521504. The cubic root of 730242040 is about 900.5108375671.

Adding to 730242040 its reverse (40242037), we get a palindrome (770484077).

The spelling of 730242040 in words is "seven hundred thirty million, two hundred forty-two thousand, forty".