2978742 has 16 divisors (see below), whose sum is σ = 6415920. Its totient is φ = 916512.

The previous prime is 2978737. The next prime is 2978749. The reversal of 2978742 is 2478792.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2978742.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19017 + ... + 19172.

It is an arithmetic number, because the mean of its divisors is an integer number (400995).

2^2978742 is an apocalyptic number.

2978742 is an abundant number, since it is smaller than the sum of its proper divisors (3437178).

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

2978742 is a wasteful number, since it uses less digits than its factorization.

2978742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38207.

The product of its digits is 56448, while the sum is 39.

The square root of 2978742 is about 1725.9032417838. The cubic root of 2978742 is about 143.8834898622.

The spelling of 2978742 in words is "two million, nine hundred seventy-eight thousand, seven hundred forty-two".