72290671 has 4 divisors (see below), whose sum is σ = 72318832. Its totient is φ = 72262512.

The previous prime is 72290639. The next prime is 72290677. The reversal of 72290671 is 17609227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72290671 - 2⁵ = 72290639 is a prime.

It is a super-3 number, since 3×72290671³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72290677) 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, 9795 + ... + 15508.

It is an arithmetic number, because the mean of its divisors is an integer number (18079708).

Almost surely, 2^72290671 is an apocalyptic number.

72290671 is a deficient number, since it is larger than the sum of its proper divisors (28161).

72290671 is a wasteful number, since it uses less digits than its factorization.

72290671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28160.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 72290671 is about 8502.3920751751. The cubic root of 72290671 is about 416.5758463032.

Adding to 72290671 its reverse (17609227), we get a palindrome (89899898).

The spelling of 72290671 in words is "seventy-two million, two hundred ninety thousand, six hundred seventy-one".