28769731 has 2 divisors, whose sum is σ = 28769732. Its totient is φ = 28769730.

The previous prime is 28769693. The next prime is 28769737. The reversal of 28769731 is 13796782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28769731 - 2⁷ = 28769603 is a prime.

It is a super-2 number, since 2×28769731² = 1655394843624722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28769737) 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 as a sum of consecutive naturals, namely, 14384865 + 14384866.

It is an arithmetic number, because the mean of its divisors is an integer number (14384866).

Almost surely, 2^28769731 is an apocalyptic number.

28769731 is a deficient number, since it is larger than the sum of its proper divisors (1).

28769731 is an equidigital number, since it uses as much as digits as its factorization.

28769731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 28769731 is about 5363.7422570441. The cubic root of 28769731 is about 306.4163491096.

The spelling of 28769731 in words is "twenty-eight million, seven hundred sixty-nine thousand, seven hundred thirty-one".