730642920 has 192 divisors, whose sum is σ = 2571238080. Its totient is φ = 165602304.

The previous prime is 730642889. The next prime is 730642921. The reversal of 730642920 is 29246037.

It is a super-2 number, since 2×730642920² = 1067678153092252800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (730642921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 805107 + ... + 806013.

It is an arithmetic number, because the mean of its divisors is an integer number (13391865).

Almost surely, 2^730642920 is an apocalyptic number.

730642920 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 730642920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285619040).

730642920 is an abundant number, since it is smaller than the sum of its proper divisors (1840595160).

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

730642920 is a wasteful number, since it uses less digits than its factorization.

730642920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 730642920 is about 27030.4073221252. The cubic root of 730642920 is about 900.6755915009.

Adding to 730642920 its reverse (29246037), we get a palindrome (759888957).

The spelling of 730642920 in words is "seven hundred thirty million, six hundred forty-two thousand, nine hundred twenty".