2928389 has 4 divisors (see below), whose sum is σ = 2943756. Its totient is φ = 2913024.

The previous prime is 2928377. The next prime is 2928397. The reversal of 2928389 is 9838292.

2928389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1809025 + 1119364 = 1345^2 + 1058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2928389 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 (2928319) 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 3 ways as a sum of consecutive naturals, for example, 7394 + ... + 7779.

It is an arithmetic number, because the mean of its divisors is an integer number (735939).

2^2928389 is an apocalyptic number.

It is an amenable number.

2928389 is a deficient number, since it is larger than the sum of its proper divisors (15367).

2928389 is a wasteful number, since it uses less digits than its factorization.

2928389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15366.

The product of its digits is 62208, while the sum is 41.

The square root of 2928389 is about 1711.2536340356. The cubic root of 2928389 is about 143.0681371213.

Subtracting 2928389 from its reverse (9838292), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2928389 in words is "two million, nine hundred twenty-eight thousand, three hundred eighty-nine".