28153429 has 4 divisors (see below), whose sum is σ = 28840140. Its totient is φ = 27466720.

The previous prime is 28153427. The next prime is 28153439. The reversal of 28153429 is 92435182.

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 1134225 + 27019204 = 1065^2 + 5198^2 .

It is not a de Polignac number, because 28153429 - 2¹ = 28153427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28153394 and 28153403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28153427) 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, 343294 + ... + 343375.

It is an arithmetic number, because the mean of its divisors is an integer number (7210035).

Almost surely, 2^28153429 is an apocalyptic number.

It is an amenable number.

28153429 is a deficient number, since it is larger than the sum of its proper divisors (686711).

28153429 is an equidigital number, since it uses as much as digits as its factorization.

28153429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686710.

The product of its digits is 17280, while the sum is 34.

The square root of 28153429 is about 5305.9804937448. The cubic root of 28153429 is about 304.2125310043.

It can be divided in two parts, 28153 and 429, that added together give a palindrome (28582).

The spelling of 28153429 in words is "twenty-eight million, one hundred fifty-three thousand, four hundred twenty-nine".