28957449 has 4 divisors (see below), whose sum is σ = 38609936. Its totient is φ = 19304964.

The previous prime is 28957433. The next prime is 28957459. The reversal of 28957449 is 94475982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28957449 - 2⁴ = 28957433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28957398 and 28957407.

It is not an unprimeable number, because it can be changed into a prime (28957459) 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, 4826239 + ... + 4826244.

It is an arithmetic number, because the mean of its divisors is an integer number (9652484).

Almost surely, 2^28957449 is an apocalyptic number.

It is an amenable number.

28957449 is a deficient number, since it is larger than the sum of its proper divisors (9652487).

28957449 is an equidigital number, since it uses as much as digits as its factorization.

28957449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9652486.

The product of its digits is 725760, while the sum is 48.

The square root of 28957449 is about 5381.2125956888. The cubic root of 28957449 is about 307.0813444715.

The spelling of 28957449 in words is "twenty-eight million, nine hundred fifty-seven thousand, four hundred forty-nine".