1664634 has 16 divisors (see below), whose sum is σ = 3342240. Its totient is φ = 552720.

The previous prime is 1664633. The next prime is 1664651. The reversal of 1664634 is 4364661.

It is not an unprimeable number, because it can be changed into a prime (1664633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2197 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (208890).

2^1664634 is an apocalyptic number.

1664634 is an abundant number, since it is smaller than the sum of its proper divisors (1677606).

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

1664634 is a wasteful number, since it uses less digits than its factorization.

1664634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085.

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

The square root of 1664634 is about 1290.2069601424. The cubic root of 1664634 is about 118.5148906852.

The spelling of 1664634 in words is "one million, six hundred sixty-four thousand, six hundred thirty-four".