73728815 has 8 divisors (see below), whose sum is σ = 88529760. Its totient is φ = 58946272.

The previous prime is 73728793. The next prime is 73728839. The reversal of 73728815 is 51882737.

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 73728815 - 2⁶ = 73728751 is a prime.

It is a super-2 number, since 2×73728815² = 10871876322608450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6782 + ... + 13908.

It is an arithmetic number, because the mean of its divisors is an integer number (11066220).

Almost surely, 2^73728815 is an apocalyptic number.

73728815 is a deficient number, since it is larger than the sum of its proper divisors (14800945).

73728815 is a wasteful number, since it uses less digits than its factorization.

73728815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9201.

The product of its digits is 94080, while the sum is 41.

The square root of 73728815 is about 8586.5484916816. The cubic root of 73728815 is about 419.3201681373.

The spelling of 73728815 in words is "seventy-three million, seven hundred twenty-eight thousand, eight hundred fifteen".