2947940 has 12 divisors (see below), whose sum is σ = 6190716. Its totient is φ = 1179168.

The previous prime is 2947939. The next prime is 2947949. The reversal of 2947940 is 497492.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 1350244 = 1264^2 + 1162^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2947940.

It is not an unprimeable number, because it can be changed into a prime (2947949) by changing a digit.

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, 73679 + ... + 73718.

It is an arithmetic number, because the mean of its divisors is an integer number (515893).

2^2947940 is an apocalyptic number.

2947940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2947940 is an abundant number, since it is smaller than the sum of its proper divisors (3242776).

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

2947940 is a wasteful number, since it uses less digits than its factorization.

2947940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147406 (or 147404 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 2947940 is about 1716.9566098187. The cubic root of 2947940 is about 143.3858229726.

The spelling of 2947940 in words is "two million, nine hundred forty-seven thousand, nine hundred forty".