2978331 has 4 divisors (see below), whose sum is σ = 3971112. Its totient is φ = 1985552.

The previous prime is 2978323. The next prime is 2978357. The reversal of 2978331 is 1338792.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2978331 - 2³ = 2978323 is a prime.

It is a super-2 number, since 2×2978331² = 17740911091122, which contains 22 as substring.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2978292 and 2978301.

It is not an unprimeable number, because it can be changed into a prime (2978321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496386 + ... + 496391.

It is an arithmetic number, because the mean of its divisors is an integer number (992778).

2^2978331 is an apocalyptic number.

2978331 is a deficient number, since it is larger than the sum of its proper divisors (992781).

2978331 is an equidigital number, since it uses as much as digits as its factorization.

2978331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992780.

The product of its digits is 9072, while the sum is 33.

The square root of 2978331 is about 1725.7841695878. The cubic root of 2978331 is about 143.8768719864.

The spelling of 2978331 in words is "two million, nine hundred seventy-eight thousand, three hundred thirty-one".