72743645 has 16 divisors (see below), whose sum is σ = 94735872. Its totient is φ = 53302080.

The previous prime is 72743633. The next prime is 72743707. The reversal of 72743645 is 54634727.

It is not a de Polignac number, because 72743645 - 2⁶ = 72743581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72743599 and 72743608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4244 + ... + 12786.

It is an arithmetic number, because the mean of its divisors is an integer number (5920992).

Almost surely, 2^72743645 is an apocalyptic number.

It is an amenable number.

72743645 is a deficient number, since it is larger than the sum of its proper divisors (21992227).

72743645 is a wasteful number, since it uses less digits than its factorization.

72743645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8692.

The product of its digits is 141120, while the sum is 38.

The square root of 72743645 is about 8528.9885097824. The cubic root of 72743645 is about 417.4441246174. Note that the first 3 decimals are identical.

The spelling of 72743645 in words is "seventy-two million, seven hundred forty-three thousand, six hundred forty-five".