1662894138 has 8 divisors (see below), whose sum is σ = 3325788288. Its totient is φ = 554298044.

The previous prime is 1662894131. The next prime is 1662894143. The reversal of 1662894138 is 8314982661.

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

1662894138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1662894131) 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, 138574506 + ... + 138574517.

It is an arithmetic number, because the mean of its divisors is an integer number (415723536).

Almost surely, 2^1662894138 is an apocalyptic number.

1662894138 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.

1662894138 is a wasteful number, since it uses less digits than its factorization.

1662894138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277149028.

The product of its digits is 497664, while the sum is 48.

The square root of 1662894138 is about 40778.5990195838. The cubic root of 1662894138 is about 1184.7358602282.

The spelling of 1662894138 in words is "one billion, six hundred sixty-two million, eight hundred ninety-four thousand, one hundred thirty-eight".