28429791 has 8 divisors (see below), whose sum is σ = 40822320. Its totient is φ = 17495232.

The previous prime is 28429789. The next prime is 28429823. The reversal of 28429791 is 19792482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28429791 - 2¹ = 28429789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28429711) 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, 364446 + ... + 364523.

It is an arithmetic number, because the mean of its divisors is an integer number (5102790).

Almost surely, 2^28429791 is an apocalyptic number.

28429791 is a deficient number, since it is larger than the sum of its proper divisors (12392529).

28429791 is a wasteful number, since it uses less digits than its factorization.

28429791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728985.

The product of its digits is 72576, while the sum is 42.

The square root of 28429791 is about 5331.9593959444. The cubic root of 28429791 is about 305.2047035731.

The spelling of 28429791 in words is "twenty-eight million, four hundred twenty-nine thousand, seven hundred ninety-one".