1864664 has 8 divisors (see below), whose sum is σ = 3496260. Its totient is φ = 932328.

The previous prime is 1864661. The next prime is 1864691. The reversal of 1864664 is 4664681.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116534 + ... + 116549.

2^1864664 is an apocalyptic number.

It is an amenable number.

1864664 is a deficient number, since it is larger than the sum of its proper divisors (1631596).

1864664 is a wasteful number, since it uses less digits than its factorization.

1864664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233089 (or 233085 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 1864664 is about 1365.5270044931. The cubic root of 1864664 is about 123.0836014806.

The spelling of 1864664 in words is "one million, eight hundred sixty-four thousand, six hundred sixty-four".