73728649 has 8 divisors (see below), whose sum is σ = 74437632. Its totient is φ = 73023120.

The previous prime is 73728647. The next prime is 73728653. The reversal of 73728649 is 94682737.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73728649 - 2¹ = 73728647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73728599 and 73728608.

It is not an unprimeable number, because it can be changed into a prime (73728647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61839 + ... + 63019.

It is an arithmetic number, because the mean of its divisors is an integer number (9304704).

Almost surely, 2^73728649 is an apocalyptic number.

It is an amenable number.

73728649 is a deficient number, since it is larger than the sum of its proper divisors (708983).

73728649 is a wasteful number, since it uses less digits than its factorization.

73728649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727.

The product of its digits is 508032, while the sum is 46.

The square root of 73728649 is about 8586.5388253941. The cubic root of 73728649 is about 419.3198534381.

The spelling of 73728649 in words is "seventy-three million, seven hundred twenty-eight thousand, six hundred forty-nine".