2978740 has 24 divisors (see below), whose sum is σ = 6624072. Its totient is φ = 1121280.

The previous prime is 2978737. The next prime is 2978749. The reversal of 2978740 is 478792.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 142884 + 2835856 = 378^2 + 1684^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2978740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978749) 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 7 ways as a sum of consecutive naturals, for example, 4041 + ... + 4720.

It is an arithmetic number, because the mean of its divisors is an integer number (276003).

2^2978740 is an apocalyptic number.

2978740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2978740 is an abundant number, since it is smaller than the sum of its proper divisors (3645332).

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

2978740 is a wasteful number, since it uses less digits than its factorization.

2978740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8787 (or 8785 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 2978740 is about 1725.9026623770. The cubic root of 2978740 is about 143.8834576599.

The spelling of 2978740 in words is "two million, nine hundred seventy-eight thousand, seven hundred forty".