72102730 has 16 divisors (see below), whose sum is σ = 148325760. Its totient is φ = 24720912.

The previous prime is 72102707. The next prime is 72102731. The reversal of 72102730 is 3720127.

It is not an unprimeable number, because it can be changed into a prime (72102731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514950 + ... + 515089.

It is an arithmetic number, because the mean of its divisors is an integer number (9270360).

Almost surely, 2^72102730 is an apocalyptic number.

72102730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72102730 is an abundant number, since it is smaller than the sum of its proper divisors (76223030).

72102730 is a wasteful number, since it uses less digits than its factorization.

72102730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030053.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 72102730 is about 8491.3326398157. The cubic root of 72102730 is about 416.2145289268.

Adding to 72102730 its reverse (3720127), we get a palindrome (75822857).

The spelling of 72102730 in words is "seventy-two million, one hundred two thousand, seven hundred thirty".