28342155 has 8 divisors (see below), whose sum is σ = 45347472. Its totient is φ = 15115808.

The previous prime is 28342133. The next prime is 28342157. The reversal of 28342155 is 55124382.

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 28342155 - 2⁵ = 28342123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28342157) 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, 944724 + ... + 944753.

It is an arithmetic number, because the mean of its divisors is an integer number (5668434).

Almost surely, 2^28342155 is an apocalyptic number.

28342155 is a deficient number, since it is larger than the sum of its proper divisors (17005317).

28342155 is a wasteful number, since it uses less digits than its factorization.

28342155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889485.

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

The square root of 28342155 is about 5323.7350610262. The cubic root of 28342155 is about 304.8907787728.

The spelling of 28342155 in words is "twenty-eight million, three hundred forty-two thousand, one hundred fifty-five".