72280726 has 8 divisors (see below), whose sum is σ = 123909840. Its totient is φ = 30977448.

The previous prime is 72280717. The next prime is 72280729. The reversal of 72280726 is 62708227.

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

It is a junction number, because it is equal to n+sod(n) for n = 72280691 and 72280700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72280729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2581441 + ... + 2581468.

It is an arithmetic number, because the mean of its divisors is an integer number (15488730).

Almost surely, 2^72280726 is an apocalyptic number.

72280726 is a deficient number, since it is larger than the sum of its proper divisors (51629114).

72280726 is a wasteful number, since it uses less digits than its factorization.

72280726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5162918.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 72280726 is about 8501.8072196445. The cubic root of 72280726 is about 416.5567427005.

The spelling of 72280726 in words is "seventy-two million, two hundred eighty thousand, seven hundred twenty-six".