2978139 has 12 divisors (see below), whose sum is σ = 4107048. Its totient is φ = 1919520.

The previous prime is 2978119. The next prime is 2978147. The reversal of 2978139 is 9318792.

It is not a de Polignac number, because 2978139 - 2⁷ = 2978011 is a prime.

It is a super-3 number, since 3×2978139³ = 79242131047333498857, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2978097 and 2978106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978119) 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 11 ways as a sum of consecutive naturals, for example, 2367 + ... + 3399.

It is an arithmetic number, because the mean of its divisors is an integer number (342254).

2^2978139 is an apocalyptic number.

2978139 is a deficient number, since it is larger than the sum of its proper divisors (1128909).

2978139 is a wasteful number, since it uses less digits than its factorization.

2978139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098 (or 1067 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 2978139 is about 1725.7285418049. The cubic root of 2978139 is about 143.8737802153.

The spelling of 2978139 in words is "two million, nine hundred seventy-eight thousand, one hundred thirty-nine".