1858664 has 8 divisors (see below), whose sum is σ = 3485010. Its totient is φ = 929328.

The previous prime is 1858663. The next prime is 1858669. The reversal of 1858664 is 4668581.

It can be written as a sum of positive squares in only one way, i.e., 940900 + 917764 = 970^2 + 958^2 .

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

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1858663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116159 + ... + 116174.

2^1858664 is an apocalyptic number.

It is an amenable number.

1858664 is a deficient number, since it is larger than the sum of its proper divisors (1626346).

1858664 is a wasteful number, since it uses less digits than its factorization.

1858664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232339 (or 232335 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 1858664 is about 1363.3282803492. The cubic root of 1858664 is about 122.9514427057.

The spelling of 1858664 in words is "one million, eight hundred fifty-eight thousand, six hundred sixty-four".