2978165 has 8 divisors (see below), whose sum is σ = 3591168. Its totient is φ = 2370960.

The previous prime is 2978161. The next prime is 2978177. The reversal of 2978165 is 5618792.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2978165 - 2² = 2978161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978161) 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, 221 + ... + 2450.

It is an arithmetic number, because the mean of its divisors is an integer number (448896).

2^2978165 is an apocalyptic number.

It is an amenable number.

2978165 is a deficient number, since it is larger than the sum of its proper divisors (613003).

2978165 is a wasteful number, since it uses less digits than its factorization.

2978165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899.

The product of its digits is 30240, while the sum is 38.

The square root of 2978165 is about 1725.7360748388. The cubic root of 2978165 is about 143.8741989004.

The spelling of 2978165 in words is "two million, nine hundred seventy-eight thousand, one hundred sixty-five".