72855805 has 8 divisors (see below), whose sum is σ = 95374944. Its totient is φ = 52986000.

The previous prime is 72855791. The next prime is 72855817. The reversal of 72855805 is 50855827.

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

It is not a de Polignac number, because 72855805 - 2¹¹ = 72853757 is a prime.

It is a Duffinian number.

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, 662271 + ... + 662380.

It is an arithmetic number, because the mean of its divisors is an integer number (11921868).

Almost surely, 2^72855805 is an apocalyptic number.

It is an amenable number.

72855805 is a deficient number, since it is larger than the sum of its proper divisors (22519139).

72855805 is a wasteful number, since it uses less digits than its factorization.

72855805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324667.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 72855805 is about 8535.5612000618. The cubic root of 72855805 is about 417.6585602571.

The spelling of 72855805 in words is "seventy-two million, eight hundred fifty-five thousand, eight hundred five".