72355861 has 8 divisors (see below), whose sum is σ = 76209984. Its totient is φ = 68560800.

The previous prime is 72355847. The next prime is 72355867. The reversal of 72355861 is 16855327.

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

It is a cyclic number.

It is not a de Polignac number, because 72355861 - 2⁷ = 72355733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72355861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72355867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12240 + ... + 17161.

It is an arithmetic number, because the mean of its divisors is an integer number (9526248).

Almost surely, 2^72355861 is an apocalyptic number.

It is an amenable number.

72355861 is a deficient number, since it is larger than the sum of its proper divisors (3854123).

72355861 is a wasteful number, since it uses less digits than its factorization.

72355861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29531.

The product of its digits is 50400, while the sum is 37.

The square root of 72355861 is about 8506.2248383169. The cubic root of 72355861 is about 416.7010280640.

The spelling of 72355861 in words is "seventy-two million, three hundred fifty-five thousand, eight hundred sixty-one".