4138658 has 4 divisors (see below), whose sum is σ = 6207990. Its totient is φ = 2069328.

The previous prime is 4138649. The next prime is 4138681. The reversal of 4138658 is 8568314.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8568314 = 2 ⋅4284157.

It can be written as a sum of positive squares in only one way, i.e., 4108729 + 29929 = 2027^2 + 173^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1034663 + ... + 1034666.

Almost surely, 2^4138658 is an apocalyptic number.

4138658 is a deficient number, since it is larger than the sum of its proper divisors (2069332).

4138658 is a wasteful number, since it uses less digits than its factorization.

4138658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069331.

The product of its digits is 23040, while the sum is 35.

The square root of 4138658 is about 2034.3691896998. The cubic root of 4138658 is about 160.5535255592.

The spelling of 4138658 in words is "four million, one hundred thirty-eight thousand, six hundred fifty-eight".