73640015 has 8 divisors (see below), whose sum is σ = 88420128. Its totient is φ = 58877280.

The previous prime is 73639999. The next prime is 73640033. The reversal of 73640015 is 51004637.

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

It is not a de Polignac number, because 73640015 - 2⁴ = 73639999 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 8369 + ... + 14741.

It is an arithmetic number, because the mean of its divisors is an integer number (11052516).

Almost surely, 2^73640015 is an apocalyptic number.

73640015 is a deficient number, since it is larger than the sum of its proper divisors (14780113).

73640015 is a wasteful number, since it uses less digits than its factorization.

73640015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8689.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 73640015 is about 8581.3760551557. The cubic root of 73640015 is about 419.1517555116.

The spelling of 73640015 in words is "seventy-three million, six hundred forty thousand, fifteen".