2742820 has 24 divisors (see below), whose sum is σ = 5959800. Its totient is φ = 1059072.

The previous prime is 2742811. The next prime is 2742853. The reversal of 2742820 is 282472.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 2742336 = 22^2 + 1656^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (248325).

2^2742820 is an apocalyptic number.

2742820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2742820 is an abundant number, since it is smaller than the sum of its proper divisors (3216980).

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

2742820 is a wasteful number, since it uses less digits than its factorization.

2742820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767 (or 4765 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 2742820 is about 1656.1461288183. The cubic root of 2742820 is about 139.9799290955.

The spelling of 2742820 in words is "two million, seven hundred forty-two thousand, eight hundred twenty".