2138658 has 8 divisors (see below), whose sum is σ = 4277328. Its totient is φ = 712884.

The previous prime is 2138657. The next prime is 2138671. The reversal of 2138658 is 8568312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2138658 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2138657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178216 + ... + 178227.

It is an arithmetic number, because the mean of its divisors is an integer number (534666).

2^2138658 is an apocalyptic number.

2138658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2138658 is a wasteful number, since it uses less digits than its factorization.

2138658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356448.

The product of its digits is 11520, while the sum is 33.

The square root of 2138658 is about 1462.4151257423. The cubic root of 2138658 is about 128.8389312377.

The spelling of 2138658 in words is "two million, one hundred thirty-eight thousand, six hundred fifty-eight".