28429345 has 8 divisors (see below), whose sum is σ = 38988864. Its totient is φ = 19494384.

The previous prime is 28429337. The next prime is 28429351. The reversal of 28429345 is 54392482.

It is a happy number.

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

It is not a de Polignac number, because 28429345 - 2³ = 28429337 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406099 + ... + 406168.

It is an arithmetic number, because the mean of its divisors is an integer number (4873608).

Almost surely, 2^28429345 is an apocalyptic number.

It is an amenable number.

28429345 is a deficient number, since it is larger than the sum of its proper divisors (10559519).

28429345 is an equidigital number, since it uses as much as digits as its factorization.

28429345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812279.

The product of its digits is 69120, while the sum is 37.

The square root of 28429345 is about 5331.9175725062. The cubic root of 28429345 is about 305.2031075711.

The spelling of 28429345 in words is "twenty-eight million, four hundred twenty-nine thousand, three hundred forty-five".