28421355 has 8 divisors (see below), whose sum is σ = 45474192. Its totient is φ = 15158048.

The previous prime is 28421347. The next prime is 28421369. The reversal of 28421355 is 55312482.

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 28421355 - 2³ = 28421347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947364 + ... + 947393.

It is an arithmetic number, because the mean of its divisors is an integer number (5684274).

Almost surely, 2^28421355 is an apocalyptic number.

28421355 is a deficient number, since it is larger than the sum of its proper divisors (17052837).

28421355 is a wasteful number, since it uses less digits than its factorization.

28421355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894765.

The product of its digits is 9600, while the sum is 30.

The square root of 28421355 is about 5331.1682584589. The cubic root of 28421355 is about 305.1745126889.

The spelling of 28421355 in words is "twenty-eight million, four hundred twenty-one thousand, three hundred fifty-five".