28374155 has 4 divisors (see below), whose sum is σ = 34048992. Its totient is φ = 22699320.

The previous prime is 28374113. The next prime is 28374161. The reversal of 28374155 is 55147382.

It is a happy number.

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

It is not a de Polignac number, because 28374155 - 2¹⁰ = 28373131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837411 + ... + 2837420.

It is an arithmetic number, because the mean of its divisors is an integer number (8512248).

Almost surely, 2^28374155 is an apocalyptic number.

28374155 is a deficient number, since it is larger than the sum of its proper divisors (5674837).

28374155 is an equidigital number, since it uses as much as digits as its factorization.

28374155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674836.

The product of its digits is 33600, while the sum is 35.

The square root of 28374155 is about 5326.7396219451. The cubic root of 28374155 is about 305.0054822987.

The spelling of 28374155 in words is "twenty-eight million, three hundred seventy-four thousand, one hundred fifty-five".