7138690 has 32 divisors (see below), whose sum is σ = 14016240. Its totient is φ = 2601984.

The previous prime is 7138673. The next prime is 7138693. The reversal of 7138690 is 968317.

It can be written as a sum of positive squares in 8 ways, for example, as 15129 + 7123561 = 123^2 + 2669^2 .

It is a super-2 number, since 2×7138690² = 101921789832200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7138693) 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, 11262 + ... + 11878.

Almost surely, 2^7138690 is an apocalyptic number.

7138690 is a deficient number, since it is larger than the sum of its proper divisors (6877550).

7138690 is a wasteful number, since it uses less digits than its factorization.

7138690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 7138690 is about 2671.8327043436. The cubic root of 7138690 is about 192.5482197750.

The spelling of 7138690 in words is "seven million, one hundred thirty-eight thousand, six hundred ninety".