1968784 has 10 divisors (see below), whose sum is σ = 3814550. Its totient is φ = 984384.

The previous prime is 1968773. The next prime is 1968797. The reversal of 1968784 is 4878691.

1968784 = 93² + 94² + ... + 188².

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 278784 = 1300^2 + 528^2 .

It is a super-2 number, since 2×1968784² = 7752220877312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1968784.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61509 + ... + 61540.

It is an arithmetic number, because the mean of its divisors is an integer number (381455).

2^1968784 is an apocalyptic number.

It is an amenable number.

1968784 is a deficient number, since it is larger than the sum of its proper divisors (1845766).

1968784 is a wasteful number, since it uses less digits than its factorization.

1968784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123057 (or 123051 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 1968784 is about 1403.1336358309. The cubic root of 1968784 is about 125.3331698605. Note that the first 3 decimals are identical.

The spelling of 1968784 in words is "one million, nine hundred sixty-eight thousand, seven hundred eighty-four".