1964688 has 60 divisors (see below), whose sum is σ = 5629104. Its totient is φ = 585600.

The previous prime is 1964671. The next prime is 1964719. The reversal of 1964688 is 8864691.

Its product of digits (82944) is a multiple of the sum of its prime factors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32178 + ... + 32238.

2^1964688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1964688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2814552).

1964688 is an abundant number, since it is smaller than the sum of its proper divisors (3664416).

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

1964688 is a wasteful number, since it uses less digits than its factorization.

1964688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 77 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1964688 is about 1401.6732857553. The cubic root of 1964688 is about 125.2461921305.

It can be divided in two parts, 196 and 4688, that added together give a palindrome (4884).

The spelling of 1964688 in words is "one million, nine hundred sixty-four thousand, six hundred eighty-eight".