7218090039 has 16 divisors (see below), whose sum is σ = 9733927392. Its totient is φ = 4757372928.

The previous prime is 7218090007. The next prime is 7218090073. The reversal of 7218090039 is 9300908127.

It is not a de Polignac number, because 7218090039 - 2⁵ = 7218090007 is a prime.

It is a super-2 number, since 2×7218090039² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7218089979 and 7218090006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218020039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107767 + ... + 161399.

It is an arithmetic number, because the mean of its divisors is an integer number (608370462).

Almost surely, 2^7218090039 is an apocalyptic number.

7218090039 is a deficient number, since it is larger than the sum of its proper divisors (2515837353).

7218090039 is a wasteful number, since it uses less digits than its factorization.

7218090039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54146.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 7218090039 is about 84959.3434473219. The cubic root of 7218090039 is about 1932.5946148979.

The spelling of 7218090039 in words is "seven billion, two hundred eighteen million, ninety thousand, thirty-nine".