28870961 has 8 divisors (see below), whose sum is σ = 33135360. Its totient is φ = 24641568.

The previous prime is 28870949. The next prime is 28870967. The reversal of 28870961 is 16907882.

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

It is not a de Polignac number, because 28870961 - 2¹⁰ = 28869937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28870967) by changing a digit.

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, 6956 + ... + 10301.

It is an arithmetic number, because the mean of its divisors is an integer number (4141920).

Almost surely, 2^28870961 is an apocalyptic number.

It is an amenable number.

28870961 is a deficient number, since it is larger than the sum of its proper divisors (4264399).

28870961 is a wasteful number, since it uses less digits than its factorization.

28870961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17503.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28870961 is about 5373.1704793353. The cubic root of 28870961 is about 306.7753168626.

The spelling of 28870961 in words is "twenty-eight million, eight hundred seventy thousand, nine hundred sixty-one".