28421653 has 8 divisors (see below), whose sum is σ = 31663800. Its totient is φ = 25330368.

The previous prime is 28421639. The next prime is 28421681. The reversal of 28421653 is 35612482.

It can be written as a sum of positive squares in 4 ways, for example, as 97969 + 28323684 = 313^2 + 5322^2 .

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 28421653 - 2¹³ = 28413461 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 (28421623) 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, 37318 + ... + 38071.

It is an arithmetic number, because the mean of its divisors is an integer number (3957975).

Almost surely, 2^28421653 is an apocalyptic number.

It is an amenable number.

28421653 is a deficient number, since it is larger than the sum of its proper divisors (3242147).

28421653 is a wasteful number, since it uses less digits than its factorization.

28421653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75431.

The product of its digits is 11520, while the sum is 31.

The square root of 28421653 is about 5331.1962072315. The cubic root of 28421653 is about 305.1755792776.

The spelling of 28421653 in words is "twenty-eight million, four hundred twenty-one thousand, six hundred fifty-three".