28653457 has 4 divisors (see below), whose sum is σ = 32746816. Its totient is φ = 24560100.

The previous prime is 28653439. The next prime is 28653473. The reversal of 28653457 is 75435682.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28653457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28653497) 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, 2046669 + ... + 2046682.

It is an arithmetic number, because the mean of its divisors is an integer number (8186704).

Almost surely, 2^28653457 is an apocalyptic number.

It is an amenable number.

28653457 is a deficient number, since it is larger than the sum of its proper divisors (4093359).

28653457 is an equidigital number, since it uses as much as digits as its factorization.

28653457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093358.

The product of its digits is 201600, while the sum is 40.

The square root of 28653457 is about 5352.8923957053. The cubic root of 28653457 is about 306.0029938335.

The spelling of 28653457 in words is "twenty-eight million, six hundred fifty-three thousand, four hundred fifty-seven".