28742641 has 2 divisors, whose sum is σ = 28742642. Its totient is φ = 28742640.

The previous prime is 28742629. The next prime is 28742653. The reversal of 28742641 is 14624782.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (28742629) and next prime (28742653).

It can be written as a sum of positive squares in only one way, i.e., 25715041 + 3027600 = 5071^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 28742641 - 2¹⁵ = 28709873 is a prime.

It is a super-2 number, since 2×28742641² = 1652278823309762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28742597 and 28742606.

It is not a weakly prime, because it can be changed into another prime (28742671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14371320 + 14371321.

It is an arithmetic number, because the mean of its divisors is an integer number (14371321).

Almost surely, 2^28742641 is an apocalyptic number.

It is an amenable number.

28742641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28742641 is an equidigital number, since it uses as much as digits as its factorization.

28742641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 28742641 is about 5361.2163731750. The cubic root of 28742641 is about 306.3201435333.

The spelling of 28742641 in words is "twenty-eight million, seven hundred forty-two thousand, six hundred forty-one".