2072778 has 8 divisors (see below), whose sum is σ = 4145568. Its totient is φ = 690924.

The previous prime is 2072773. The next prime is 2072789. The reversal of 2072778 is 8772702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2072778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2072773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172726 + ... + 172737.

It is an arithmetic number, because the mean of its divisors is an integer number (518196).

2^2072778 is an apocalyptic number.

2072778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2072778 is a wasteful number, since it uses less digits than its factorization.

2072778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345468.

The product of its (nonzero) digits is 10976, while the sum is 33.

The square root of 2072778 is about 1439.7145550421. The cubic root of 2072778 is about 127.5021760490.

It can be divided in two parts, 2072 and 778, that added together give a triangular number (2850 = T₇₅).

The spelling of 2072778 in words is "two million, seventy-two thousand, seven hundred seventy-eight".