28988633 has 2 divisors, whose sum is σ = 28988634. Its totient is φ = 28988632.

The previous prime is 28988611. The next prime is 28988653. The reversal of 28988633 is 33688982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27793984 + 1194649 = 5272^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 28988633 - 2²⁰ = 27940057 is a prime.

It is not a weakly prime, because it can be changed into another prime (28988653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494316 + 14494317.

It is an arithmetic number, because the mean of its divisors is an integer number (14494317).

Almost surely, 2^28988633 is an apocalyptic number.

It is an amenable number.

28988633 is a deficient number, since it is larger than the sum of its proper divisors (1).

28988633 is an equidigital number, since it uses as much as digits as its factorization.

28988633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 47.

The square root of 28988633 is about 5384.1093042397. The cubic root of 28988633 is about 307.1915359143.

The spelling of 28988633 in words is "twenty-eight million, nine hundred eighty-eight thousand, six hundred thirty-three".