72851705 has 16 divisors (see below), whose sum is σ = 92688384. Its totient is φ = 54872640.

The previous prime is 72851687. The next prime is 72851717. The reversal of 72851705 is 50715827.

It is not a de Polignac number, because 72851705 - 2⁶ = 72851641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (5793024).

Almost surely, 2^72851705 is an apocalyptic number.

It is an amenable number.

72851705 is a deficient number, since it is larger than the sum of its proper divisors (19836679).

72851705 is a wasteful number, since it uses less digits than its factorization.

72851705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12776.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 72851705 is about 8535.3210250113. The cubic root of 72851705 is about 417.6507254561.

The spelling of 72851705 in words is "seventy-two million, eight hundred fifty-one thousand, seven hundred five".