28653149 has 4 divisors (see below), whose sum is σ = 32746464. Its totient is φ = 24559836.

The previous prime is 28653113. The next prime is 28653151. The reversal of 28653149 is 94135682.

It is a happy number.

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 de Polignac number, because none of the positive numbers 2^k-28653149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28653169) 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, 2046647 + ... + 2046660.

It is an arithmetic number, because the mean of its divisors is an integer number (8186616).

Almost surely, 2^28653149 is an apocalyptic number.

It is an amenable number.

28653149 is a deficient number, since it is larger than the sum of its proper divisors (4093315).

28653149 is an equidigital number, since it uses as much as digits as its factorization.

28653149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093314.

The product of its digits is 51840, while the sum is 38.

The square root of 28653149 is about 5352.8636261351. The cubic root of 28653149 is about 306.0018974066.

It can be divided in two parts, 286 and 53149, that added together give a palindrome (53435).

The spelling of 28653149 in words is "twenty-eight million, six hundred fifty-three thousand, one hundred forty-nine".