28497339 has 56 divisors (see below), whose sum is σ = 47987072. Its totient is φ = 16796160.

The previous prime is 28497331. The next prime is 28497361. The reversal of 28497339 is 93379482.

It is a happy number.

It is not a de Polignac number, because 28497339 - 2³ = 28497331 is a prime.

It is a Duffinian number.

Its product of digits (326592) is a multiple of the sum of its prime divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 28497294 and 28497303.

It is not an unprimeable number, because it can be changed into a prime (28497331) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 293739 + ... + 293835.

It is an arithmetic number, because the mean of its divisors is an integer number (856912).

Almost surely, 2^28497339 is an apocalyptic number.

28497339 is a deficient number, since it is larger than the sum of its proper divisors (19489733).

28497339 is an equidigital number, since it uses as much as digits as its factorization.

28497339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 144 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 28497339 is about 5338.2898947135. The cubic root of 28497339 is about 305.4462302786.

The spelling of 28497339 in words is "twenty-eight million, four hundred ninety-seven thousand, three hundred thirty-nine".