28342905 has 8 divisors (see below), whose sum is σ = 45348672. Its totient is φ = 15116208.

The previous prime is 28342903. The next prime is 28342933. The reversal of 28342905 is 50924382.

It is a happy number.

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

It is not a de Polignac number, because 28342905 - 2¹ = 28342903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28342901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944749 + ... + 944778.

It is an arithmetic number, because the mean of its divisors is an integer number (5668584).

Almost surely, 2^28342905 is an apocalyptic number.

It is an amenable number.

28342905 is a deficient number, since it is larger than the sum of its proper divisors (17005767).

28342905 is a wasteful number, since it uses less digits than its factorization.

28342905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889535.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28342905 is about 5323.8054998281. The cubic root of 28342905 is about 304.8934681245.

The spelling of 28342905 in words is "twenty-eight million, three hundred forty-two thousand, nine hundred five".