2978143 has 8 divisors (see below), whose sum is σ = 3461760. Its totient is φ = 2509080.

The previous prime is 2978119. The next prime is 2978147. The reversal of 2978143 is 3418792.

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

It is a de Polignac number, because none of the positive numbers 2^k-2978143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2978099 and 2978108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978147) 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, 3193 + ... + 4018.

It is an arithmetic number, because the mean of its divisors is an integer number (432720).

2^2978143 is an apocalyptic number.

2978143 is a deficient number, since it is larger than the sum of its proper divisors (483617).

2978143 is an equidigital number, since it uses as much as digits as its factorization.

2978143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7277.

The product of its digits is 12096, while the sum is 34.

The square root of 2978143 is about 1725.7297007353. The cubic root of 2978143 is about 143.8738446285.

The spelling of 2978143 in words is "two million, nine hundred seventy-eight thousand, one hundred forty-three".