28429247 has 8 divisors (see below), whose sum is σ = 35444352. Its totient is φ = 22152600.

The previous prime is 28429229. The next prime is 28429249. The reversal of 28429247 is 74292482.

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 28429247 - 2¹⁰ = 28428223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28429247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28429249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184529 + ... + 184682.

It is an arithmetic number, because the mean of its divisors is an integer number (4430544).

Almost surely, 2^28429247 is an apocalyptic number.

28429247 is a deficient number, since it is larger than the sum of its proper divisors (7015105).

28429247 is a wasteful number, since it uses less digits than its factorization.

28429247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369229.

The product of its digits is 64512, while the sum is 38.

The square root of 28429247 is about 5331.9083825587. The cubic root of 28429247 is about 305.2027568779.

The spelling of 28429247 in words is "twenty-eight million, four hundred twenty-nine thousand, two hundred forty-seven".