72290771 has 8 divisors (see below), whose sum is σ = 86210304. Its totient is φ = 59269320.

The previous prime is 72290741. The next prime is 72290809. The reversal of 72290771 is 17709227.

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 72290771 - 2¹⁰ = 72289747 is a prime.

It is a super-3 number, since 3×72290771³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72290741) 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, 224345 + ... + 224666.

It is an arithmetic number, because the mean of its divisors is an integer number (10776288).

Almost surely, 2^72290771 is an apocalyptic number.

72290771 is a deficient number, since it is larger than the sum of its proper divisors (13919533).

72290771 is a wasteful number, since it uses less digits than its factorization.

72290771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449041.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 72290771 is about 8502.3979558710. The cubic root of 72290771 is about 416.5760383868.

Adding to 72290771 its reverse (17709227), we get a palindrome (89999998).

The spelling of 72290771 in words is "seventy-two million, two hundred ninety thousand, seven hundred seventy-one".