28653619 has 8 divisors (see below), whose sum is σ = 30410208. Its totient is φ = 26904960.

The previous prime is 28653571. The next prime is 28653623. The reversal of 28653619 is 91635682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28653619 - 2⁷ = 28653491 is a prime.

It is a super-2 number, since 2×28653619² = 1642059763594322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28653649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6549 + ... + 10009.

It is an arithmetic number, because the mean of its divisors is an integer number (3801276).

Almost surely, 2^28653619 is an apocalyptic number.

28653619 is a deficient number, since it is larger than the sum of its proper divisors (1756589).

28653619 is a wasteful number, since it uses less digits than its factorization.

28653619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965.

The product of its digits is 77760, while the sum is 40.

The square root of 28653619 is about 5352.9075276900. The cubic root of 28653619 is about 306.0035705224.

The spelling of 28653619 in words is "twenty-eight million, six hundred fifty-three thousand, six hundred nineteen".