28929155 has 16 divisors (see below), whose sum is σ = 36954144. Its totient is φ = 21665280.

The previous prime is 28929143. The next prime is 28929157. The reversal of 28929155 is 55192982.

It is not a de Polignac number, because 28929155 - 2¹² = 28925059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28929157) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17129 + ... + 18741.

It is an arithmetic number, because the mean of its divisors is an integer number (2309634).

Almost surely, 2^28929155 is an apocalyptic number.

28929155 is a deficient number, since it is larger than the sum of its proper divisors (8024989).

28929155 is a wasteful number, since it uses less digits than its factorization.

28929155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846.

The product of its digits is 64800, while the sum is 41.

The square root of 28929155 is about 5378.5829918297. The cubic root of 28929155 is about 306.9812966285.

The spelling of 28929155 in words is "twenty-eight million, nine hundred twenty-nine thousand, one hundred fifty-five".