72278833 has 8 divisors (see below), whose sum is σ = 79930656. Its totient is φ = 64807200.

The previous prime is 72278819. The next prime is 72278861. The reversal of 72278833 is 33887227.

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 72278833 - 2²⁵ = 38724401 is a prime.

It is a Duffinian number.

72278833 is a modest number, since divided by 8833 gives 7227 as remainder.

It is not an unprimeable number, because it can be changed into a prime (72278813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44203 + ... + 45808.

It is an arithmetic number, because the mean of its divisors is an integer number (9991332).

Almost surely, 2^72278833 is an apocalyptic number.

72278833 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

72278833 is a deficient number, since it is larger than the sum of its proper divisors (7651823).

72278833 is a wasteful number, since it uses less digits than its factorization.

72278833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90095.

The product of its digits is 112896, while the sum is 40.

The square root of 72278833 is about 8501.6958896446. The cubic root of 72278833 is about 416.5531061902.

The spelling of 72278833 in words is "seventy-two million, two hundred seventy-eight thousand, eight hundred thirty-three".