1967664 has 20 divisors (see below), whose sum is σ = 5083256. Its totient is φ = 655872.

The previous prime is 1967657. The next prime is 1967671. The reversal of 1967664 is 4667691.

It is an interprime number because it is at equal distance from previous prime (1967657) and next prime (1967671).

It is a zygodrome in base 2.

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, 20449 + ... + 20544.

2^1967664 is an apocalyptic number.

It is an amenable number.

1967664 is an abundant number, since it is smaller than the sum of its proper divisors (3115592).

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

1967664 is a wasteful number, since it uses less digits than its factorization.

1967664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41004 (or 40998 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 1967664 is about 1402.7344723789. The cubic root of 1967664 is about 125.3093988801.

The spelling of 1967664 in words is "one million, nine hundred sixty-seven thousand, six hundred sixty-four".