72729390 has 32 divisors (see below), whose sum is σ = 180571680. Its totient is φ = 18725504.

The previous prime is 72729353. The next prime is 72729401. The reversal of 72729390 is 9392727.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40929 + ... + 42668.

It is an arithmetic number, because the mean of its divisors is an integer number (5642865).

Almost surely, 2^72729390 is an apocalyptic number.

72729390 is an abundant number, since it is smaller than the sum of its proper divisors (107842290).

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

72729390 is a wasteful number, since it uses less digits than its factorization.

72729390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83636.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 72729390 is about 8528.1527894381. The cubic root of 72729390 is about 417.4168550888.

The spelling of 72729390 in words is "seventy-two million, seven hundred twenty-nine thousand, three hundred ninety".