2928321 has 18 divisors (see below), whose sum is σ = 4651010. Its totient is φ = 1774080.

The previous prime is 2928319. The next prime is 2928361. The reversal of 2928321 is 1238292.

2928321 = T₁₈ + T₁₉ + ... + T₂₅₉.

It is a happy number.

2928321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1742400 + 1185921 = 1320^2 + 1089^2 .

It is not a de Polignac number, because 2928321 - 2¹ = 2928319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2928311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 256 + ... + 2433.

2^2928321 is an apocalyptic number.

It is an amenable number.

2928321 is a deficient number, since it is larger than the sum of its proper divisors (1722689).

2928321 is a wasteful number, since it uses less digits than its factorization.

2928321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717 (or 2703 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2928321 is about 1711.2337654453. The cubic root of 2928321 is about 143.0670297196.

It can be divided in two parts, 2928 and 321, that added together give a square (3249 = 57²).

The spelling of 2928321 in words is "two million, nine hundred twenty-eight thousand, three hundred twenty-one".