1978768 has 20 divisors (see below), whose sum is σ = 4182768. Its totient is φ = 899360.

The previous prime is 1978763. The next prime is 1978771. The reversal of 1978768 is 8678791.

It is not an unprimeable number, because it can be changed into a prime (1978763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5446 + ... + 5797.

2^1978768 is an apocalyptic number.

It is an amenable number.

1978768 is an abundant number, since it is smaller than the sum of its proper divisors (2204000).

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

1978768 is a wasteful number, since it uses less digits than its factorization.

1978768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11262 (or 11256 counting only the distinct ones).

The product of its digits is 169344, while the sum is 46.

The square root of 1978768 is about 1406.6868876904. The cubic root of 1978768 is about 125.5446738625.

It can be divided in two parts, 19 and 78768, that added together give a palindrome (78787).

The spelling of 1978768 in words is "one million, nine hundred seventy-eight thousand, seven hundred sixty-eight".