72290729 has 12 divisors (see below), whose sum is σ = 86807808. Its totient is φ = 59963400.

The previous prime is 72290723. The next prime is 72290741. The reversal of 72290729 is 92709227.

It is not a de Polignac number, because 72290729 - 2⁸ = 72290473 is a prime.

It is a super-3 number, since 3×72290729³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72290692 and 72290701.

It is not an unprimeable number, because it can be changed into a prime (72290723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22277 + ... + 25314.

It is an arithmetic number, because the mean of its divisors is an integer number (7233984).

Almost surely, 2^72290729 is an apocalyptic number.

It is an amenable number.

72290729 is a deficient number, since it is larger than the sum of its proper divisors (14517079).

72290729 is a wasteful number, since it uses less digits than its factorization.

72290729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47636 (or 47629 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 72290729 is about 8502.3954859792. The cubic root of 72290729 is about 416.5759577117.

The spelling of 72290729 in words is "seventy-two million, two hundred ninety thousand, seven hundred twenty-nine".