28790761 has 4 divisors (see below), whose sum is σ = 29278800. Its totient is φ = 28302724.

The previous prime is 28790759. The next prime is 28790777. The reversal of 28790761 is 16709782.

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 28790761 - 2¹ = 28790759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28790731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243931 + ... + 244048.

It is an arithmetic number, because the mean of its divisors is an integer number (7319700).

Almost surely, 2^28790761 is an apocalyptic number.

It is an amenable number.

28790761 is a deficient number, since it is larger than the sum of its proper divisors (488039).

28790761 is an equidigital number, since it uses as much as digits as its factorization.

28790761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488038.

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

The square root of 28790761 is about 5365.7022839513. The cubic root of 28790761 is about 306.4909919849.

The spelling of 28790761 in words is "twenty-eight million, seven hundred ninety thousand, seven hundred sixty-one".