28601929 has 4 divisors (see below), whose sum is σ = 28646784. Its totient is φ = 28557076.

The previous prime is 28601921. The next prime is 28601953. The reversal of 28601929 is 92910682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28601929 - 2³ = 28601921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28601921) 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 3 ways as a sum of consecutive naturals, for example, 21457 + ... + 22750.

It is an arithmetic number, because the mean of its divisors is an integer number (7161696).

Almost surely, 2^28601929 is an apocalyptic number.

It is an amenable number.

28601929 is a deficient number, since it is larger than the sum of its proper divisors (44855).

28601929 is an equidigital number, since it uses as much as digits as its factorization.

28601929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44854.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 28601929 is about 5348.0771310818. The cubic root of 28601929 is about 305.8194536355.

The spelling of 28601929 in words is "twenty-eight million, six hundred one thousand, nine hundred twenty-nine".