72786843 has 20 divisors (see below), whose sum is σ = 115129080. Its totient is φ = 45669312.

The previous prime is 72786817. The next prime is 72786851. The reversal of 72786843 is 34868727.

It is a happy number.

It is not a de Polignac number, because 72786843 - 2⁵ = 72786811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72786863) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25053 + ... + 27806.

It is an arithmetic number, because the mean of its divisors is an integer number (5756454).

Almost surely, 2^72786843 is an apocalyptic number.

72786843 is a deficient number, since it is larger than the sum of its proper divisors (42342237).

72786843 is a wasteful number, since it uses less digits than its factorization.

72786843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52888 (or 52879 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 72786843 is about 8531.5205561494. The cubic root of 72786843 is about 417.5267397744.

The spelling of 72786843 in words is "seventy-two million, seven hundred eighty-six thousand, eight hundred forty-three".