28153423 has 4 divisors (see below), whose sum is σ = 28752480. Its totient is φ = 27554368.

The previous prime is 28153409. The next prime is 28153427. The reversal of 28153423 is 32435182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28153423 - 2²¹ = 26056271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28153391 and 28153400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28153427) 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, 299458 + ... + 299551.

It is an arithmetic number, because the mean of its divisors is an integer number (7188120).

Almost surely, 2^28153423 is an apocalyptic number.

28153423 is a deficient number, since it is larger than the sum of its proper divisors (599057).

28153423 is an equidigital number, since it uses as much as digits as its factorization.

28153423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599056.

The product of its digits is 5760, while the sum is 28.

The square root of 28153423 is about 5305.9799283450. The cubic root of 28153423 is about 304.2125093933.

The spelling of 28153423 in words is "twenty-eight million, one hundred fifty-three thousand, four hundred twenty-three".