2928643 has 4 divisors (see below), whose sum is σ = 2934360. Its totient is φ = 2922928.

The previous prime is 2928581. The next prime is 2928647. The reversal of 2928643 is 3468292.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2928643 is a prime.

It is a Duffinian number.

2928643 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2928599 and 2928608.

It is not an unprimeable number, because it can be changed into a prime (2928647) 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, 2005 + ... + 3142.

It is an arithmetic number, because the mean of its divisors is an integer number (733590).

2^2928643 is an apocalyptic number.

2928643 is a deficient number, since it is larger than the sum of its proper divisors (5717).

2928643 is an equidigital number, since it uses as much as digits as its factorization.

2928643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716.

The product of its digits is 20736, while the sum is 34.

The square root of 2928643 is about 1711.3278470241. The cubic root of 2928643 is about 143.0722734406.

The spelling of 2928643 in words is "two million, nine hundred twenty-eight thousand, six hundred forty-three".