28901929 has 8 divisors (see below), whose sum is σ = 33205248. Its totient is φ = 24642240.

The previous prime is 28901923. The next prime is 28901947. The reversal of 28901929 is 92910982.

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

It is not a de Polignac number, because 28901929 - 2⁹ = 28901417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28901891 and 28901900.

It is not an unprimeable number, because it can be changed into a prime (28901923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9472 + ... + 12145.

It is an arithmetic number, because the mean of its divisors is an integer number (4150656).

Almost surely, 2^28901929 is an apocalyptic number.

It is an amenable number.

28901929 is a deficient number, since it is larger than the sum of its proper divisors (4303319).

28901929 is a wasteful number, since it uses less digits than its factorization.

28901929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21815.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 28901929 is about 5376.0514320456. The cubic root of 28901929 is about 306.8849636374.

The spelling of 28901929 in words is "twenty-eight million, nine hundred one thousand, nine hundred twenty-nine".