28929575 has 6 divisors (see below), whose sum is σ = 35872704. Its totient is φ = 23143640.

The previous prime is 28929557. The next prime is 28929611. The reversal of 28929575 is 57592982.

It is not a de Polignac number, because 28929575 - 2⁸ = 28929319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 578567 + ... + 578616.

It is an arithmetic number, because the mean of its divisors is an integer number (5978784).

Almost surely, 2^28929575 is an apocalyptic number.

28929575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28929575 is a deficient number, since it is larger than the sum of its proper divisors (6943129).

28929575 is a wasteful number, since it uses less digits than its factorization.

28929575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157193 (or 1157188 counting only the distinct ones).

The product of its digits is 453600, while the sum is 47.

The square root of 28929575 is about 5378.6220354288. The cubic root of 28929575 is about 306.9827822292.

The spelling of 28929575 in words is "twenty-eight million, nine hundred twenty-nine thousand, five hundred seventy-five".