1778076 has 18 divisors (see below), whose sum is σ = 4494672. Its totient is φ = 592680.

The previous prime is 1778071. The next prime is 1778099. The reversal of 1778076 is 6708771.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 49391 = 1778076 / (1 + 7 + 7 + 8 + 0 + 7 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1778076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1778071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24660 + ... + 24731.

It is an arithmetic number, because the mean of its divisors is an integer number (249704).

2^1778076 is an apocalyptic number.

It is an amenable number.

1778076 is an abundant number, since it is smaller than the sum of its proper divisors (2716596).

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

1778076 is a wasteful number, since it uses less digits than its factorization.

1778076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49401 (or 49396 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

The square root of 1778076 is about 1333.4451619770. The cubic root of 1778076 is about 121.1481462985.

The spelling of 1778076 in words is "one million, seven hundred seventy-eight thousand, seventy-six".