2774780 has 12 divisors (see below), whose sum is σ = 5827080. Its totient is φ = 1109904.

The previous prime is 2774777. The next prime is 2774801. The reversal of 2774780 is 874772.

It is a self number, because there is not a number n which added to its sum of digits gives 2774780.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69350 + ... + 69389.

It is an arithmetic number, because the mean of its divisors is an integer number (485590).

2^2774780 is an apocalyptic number.

2774780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2774780 is an abundant number, since it is smaller than the sum of its proper divisors (3052300).

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

2774780 is a wasteful number, since it uses less digits than its factorization.

2774780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138748 (or 138746 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 2774780 is about 1665.7670905622. The cubic root of 2774780 is about 140.5215242075.

The spelling of 2774780 in words is "two million, seven hundred seventy-four thousand, seven hundred eighty".