1900664 has 16 divisors (see below), whose sum is σ = 3585120. Its totient is φ = 944640.

The previous prime is 1900621. The next prime is 1900667. The reversal of 1900664 is 4660091.

It is a super-2 number, since 2×1900664² = 7225047281792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900667) 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, 929 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (224070).

2^1900664 is an apocalyptic number.

It is an amenable number.

1900664 is a deficient number, since it is larger than the sum of its proper divisors (1684456).

1900664 is a wasteful number, since it uses less digits than its factorization.

1900664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1900664 is about 1378.6457122843. The cubic root of 1900664 is about 123.8706594473.

The spelling of 1900664 in words is "one million, nine hundred thousand, six hundred sixty-four".