7138660 has 12 divisors (see below), whose sum is σ = 14991228. Its totient is φ = 2855456.

The previous prime is 7138643. The next prime is 7138673. The reversal of 7138660 is 668317.

It can be written as a sum of positive squares in 2 ways, for example, as 1493284 + 5645376 = 1222^2 + 2376^2 .

It is a super-3 number, since 3×7138660³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 178447 + ... + 178486.

It is an arithmetic number, because the mean of its divisors is an integer number (1249269).

Almost surely, 2^7138660 is an apocalyptic number.

It is an amenable number.

7138660 is an abundant number, since it is smaller than the sum of its proper divisors (7852568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7138660 is a wasteful number, since it uses less digits than its factorization.

7138660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356942 (or 356940 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 7138660 is about 2671.8270902137. The cubic root of 7138660 is about 192.5479500498.

The spelling of 7138660 in words is "seven million, one hundred thirty-eight thousand, six hundred sixty".