1634664 has 16 divisors (see below), whose sum is σ = 4086720. Its totient is φ = 544880.

The previous prime is 1634657. The next prime is 1634681. The reversal of 1634664 is 4664361.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34032 + ... + 34079.

It is an arithmetic number, because the mean of its divisors is an integer number (255420).

2^1634664 is an apocalyptic number.

It is an amenable number.

1634664 is an abundant number, since it is smaller than the sum of its proper divisors (2452056).

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

1634664 is a wasteful number, since it uses less digits than its factorization.

1634664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68120 (or 68116 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 1634664 is about 1278.5397921066. The cubic root of 1634664 is about 117.7993333699.

The spelling of 1634664 in words is "one million, six hundred thirty-four thousand, six hundred sixty-four".