72685986 has 8 divisors (see below), whose sum is σ = 145371984. Its totient is φ = 24228660.

The previous prime is 72685961. The next prime is 72685997. The reversal of 72685986 is 68958627.

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

72685986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6057160 + ... + 6057171.

It is an arithmetic number, because the mean of its divisors is an integer number (18171498).

Almost surely, 2^72685986 is an apocalyptic number.

72685986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72685986 is a wasteful number, since it uses less digits than its factorization.

72685986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12114336.

The product of its digits is 1451520, while the sum is 51.

The square root of 72685986 is about 8525.6076616274. The cubic root of 72685986 is about 417.3338021602. Note that the first 3 decimals are identical.

The spelling of 72685986 in words is "seventy-two million, six hundred eighty-five thousand, nine hundred eighty-six".