1778996 has 12 divisors (see below), whose sum is σ = 3185952. Its totient is φ = 868728.

The previous prime is 1778993. The next prime is 1779007. The reversal of 1778996 is 6998771.

It is a self number, because there is not a number n which added to its sum of digits gives 1778996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778993) 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, 5000 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (265496).

2^1778996 is an apocalyptic number.

It is an amenable number.

1778996 is a deficient number, since it is larger than the sum of its proper divisors (1406956).

1778996 is a wasteful number, since it uses less digits than its factorization.

1778996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390 (or 10388 counting only the distinct ones).

The product of its digits is 190512, while the sum is 47.

The square root of 1778996 is about 1333.7900884322. The cubic root of 1778996 is about 121.1690372460.

The spelling of 1778996 in words is "one million, seven hundred seventy-eight thousand, nine hundred ninety-six".