72290807 has 4 divisors (see below), whose sum is σ = 72751416. Its totient is φ = 71830200.

The previous prime is 72290741. The next prime is 72290809. The reversal of 72290807 is 70809227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70809227 = 61 ⋅1160807.

It is a cyclic number.

It is not a de Polignac number, because 72290807 - 2²⁰ = 71242231 is a prime.

It is a super-3 number, since 3×72290807³ (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 (72290809) 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, 230069 + ... + 230382.

It is an arithmetic number, because the mean of its divisors is an integer number (18187854).

Almost surely, 2^72290807 is an apocalyptic number.

72290807 is a deficient number, since it is larger than the sum of its proper divisors (460609).

72290807 is a wasteful number, since it uses less digits than its factorization.

72290807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460608.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 72290807 is about 8502.4000729206. The cubic root of 72290807 is about 416.5761075369.

The spelling of 72290807 in words is "seventy-two million, two hundred ninety thousand, eight hundred seven".