28491301 has 2 divisors, whose sum is σ = 28491302. Its totient is φ = 28491300.

The previous prime is 28491299. The next prime is 28491329. The reversal of 28491301 is 10319482.

It is a happy number.

It is an a-pointer prime, because the next prime (28491329) can be obtained adding 28491301 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 454276 = 5295^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 28491301 - 2¹ = 28491299 is a prime.

Together with 28491299, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28491301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28491341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14245650 + 14245651.

It is an arithmetic number, because the mean of its divisors is an integer number (14245651).

Almost surely, 2^28491301 is an apocalyptic number.

It is an amenable number.

28491301 is a deficient number, since it is larger than the sum of its proper divisors (1).

28491301 is an equidigital number, since it uses as much as digits as its factorization.

28491301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28491301 is about 5337.7243278386. The cubic root of 28491301 is about 305.4246561636.

The spelling of 28491301 in words is "twenty-eight million, four hundred ninety-one thousand, three hundred one".