28919953 has 8 divisors (see below), whose sum is σ = 29288160. Its totient is φ = 28554240.

The previous prime is 28919911. The next prime is 28919959. The reversal of 28919953 is 35991982.

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 28919953 - 2¹³ = 28911761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28919959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33238 + ... + 34096.

It is an arithmetic number, because the mean of its divisors is an integer number (3661020).

Almost surely, 2^28919953 is an apocalyptic number.

It is an amenable number.

28919953 is a deficient number, since it is larger than the sum of its proper divisors (368207).

28919953 is a wasteful number, since it uses less digits than its factorization.

28919953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247.

The product of its digits is 174960, while the sum is 46.

The square root of 28919953 is about 5377.7274940257. The cubic root of 28919953 is about 306.9487442149.

The spelling of 28919953 in words is "twenty-eight million, nine hundred nineteen thousand, nine hundred fifty-three".