28653345 has 56 divisors (see below), whose sum is σ = 58969536. Its totient is φ = 13087008.

The previous prime is 28653323. The next prime is 28653353. The reversal of 28653345 is 54335682.

It is a happy number.

28653345 is a `hidden beast` number, since 2 + 86 + 533 + 45 = 666.

It is not a de Polignac number, because 28653345 - 2⁷ = 28653217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 24954 + ... + 26076.

Almost surely, 2^28653345 is an apocalyptic number.

It is an amenable number.

28653345 is an abundant number, since it is smaller than the sum of its proper divisors (30316191).

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

28653345 is an equidigital number, since it uses as much as digits as its factorization.

28653345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1138 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 28653345 is about 5352.8819340613. The cubic root of 28653345 is about 306.0025951337.

The spelling of 28653345 in words is "twenty-eight million, six hundred fifty-three thousand, three hundred forty-five".