28770961 has 8 divisors (see below), whose sum is σ = 29297664. Its totient is φ = 28249200.

The previous prime is 28770943. The next prime is 28771009. The reversal of 28770961 is 16907782.

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

It is a cyclic number.

It is not a de Polignac number, because 28770961 - 2²³ = 20382353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28770461) 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, 11706 + ... + 13948.

It is an arithmetic number, because the mean of its divisors is an integer number (3662208).

Almost surely, 2^28770961 is an apocalyptic number.

It is an amenable number.

28770961 is a deficient number, since it is larger than the sum of its proper divisors (526703).

28770961 is a wasteful number, since it uses less digits than its factorization.

28770961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 28770961 is about 5363.8569145718. The cubic root of 28770961 is about 306.4207158140.

The spelling of 28770961 in words is "twenty-eight million, seven hundred seventy thousand, nine hundred sixty-one".