2389428 has 18 divisors (see below), whose sum is σ = 6040034. Its totient is φ = 796464.

The previous prime is 2389427. The next prime is 2389451. The reversal of 2389428 is 8249832.

2389428 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., 2377764 + 11664 = 1542^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 66373 = 2389428 / (2 + 3 + 8 + 9 + 4 + 2 + 8).

It is a d-powerful number, because it can be written as 2¹⁰ + 3¹³ + 8² + 9⁴ + 4⁵ + 2¹⁹ + 8⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 2389392 and 2389401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2389427) 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 5 ways as a sum of consecutive naturals, for example, 33151 + ... + 33222.

2^2389428 is an apocalyptic number.

It is an amenable number.

2389428 is an abundant number, since it is smaller than the sum of its proper divisors (3650606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2389428 is a wasteful number, since it uses less digits than its factorization.

2389428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66383 (or 66378 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 2389428 is about 1545.7774742828. Note that the first 3 decimals coincide. The cubic root of 2389428 is about 133.6897105051.

The spelling of 2389428 in words is "two million, three hundred eighty-nine thousand, four hundred twenty-eight".