6138658 has 4 divisors (see below), whose sum is σ = 9207990. Its totient is φ = 3069328.

The previous prime is 6138647. The next prime is 6138659. The reversal of 6138658 is 8568316.

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

It can be written as a sum of positive squares in only one way, i.e., 4809249 + 1329409 = 2193^2 + 1153^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6138659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1534663 + ... + 1534666.

Almost surely, 2^6138658 is an apocalyptic number.

6138658 is a deficient number, since it is larger than the sum of its proper divisors (3069332).

6138658 is a wasteful number, since it uses less digits than its factorization.

6138658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069331.

The product of its digits is 34560, while the sum is 37.

The square root of 6138658 is about 2477.6315303128. The cubic root of 6138658 is about 183.1011812684.

The spelling of 6138658 in words is "six million, one hundred thirty-eight thousand, six hundred fifty-eight".