72279845 has 8 divisors (see below), whose sum is σ = 94620960. Its totient is φ = 52567120.

The previous prime is 72279839. The next prime is 72279847. The reversal of 72279845 is 54897227.

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

It is not a de Polignac number, because 72279845 - 2⁴ = 72279829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72279796 and 72279805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72279847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657035 + ... + 657144.

It is an arithmetic number, because the mean of its divisors is an integer number (11827620).

Almost surely, 2^72279845 is an apocalyptic number.

It is an amenable number.

72279845 is a deficient number, since it is larger than the sum of its proper divisors (22341115).

72279845 is a wasteful number, since it uses less digits than its factorization.

72279845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314195.

The product of its digits is 282240, while the sum is 44.

The square root of 72279845 is about 8501.7554069733. The cubic root of 72279845 is about 416.5550502807. Note that the first 3 decimals are identical.

The spelling of 72279845 in words is "seventy-two million, two hundred seventy-nine thousand, eight hundred forty-five".