1838664 has 24 divisors (see below), whose sum is σ = 4979910. Its totient is φ = 612864.

The previous prime is 1838659. The next prime is 1838671. The reversal of 1838664 is 4668381.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 736164 = 1050^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12697 + ... + 12840.

2^1838664 is an apocalyptic number.

It is an amenable number.

1838664 is an abundant number, since it is smaller than the sum of its proper divisors (3141246).

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

1838664 is a wasteful number, since it uses less digits than its factorization.

1838664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25549 (or 25542 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1838664 is about 1355.9734510675. The cubic root of 1838664 is about 122.5088484515.

The spelling of 1838664 in words is "one million, eight hundred thirty-eight thousand, six hundred sixty-four".