28933501 has 2 divisors, whose sum is σ = 28933502. Its totient is φ = 28933500.

The previous prime is 28933483. The next prime is 28933543. The reversal of 28933501 is 10533982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 9308601 = 4430^2 + 3051^2 .

It is a cyclic number.

It is not a de Polignac number, because 28933501 - 2⁵ = 28933469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28933591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14466750 + 14466751.

It is an arithmetic number, because the mean of its divisors is an integer number (14466751).

Almost surely, 2^28933501 is an apocalyptic number.

It is an amenable number.

28933501 is a deficient number, since it is larger than the sum of its proper divisors (1).

28933501 is an equidigital number, since it uses as much as digits as its factorization.

28933501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 28933501 is about 5378.9869864130. The cubic root of 28933501 is about 306.9966683635.

The spelling of 28933501 in words is "twenty-eight million, nine hundred thirty-three thousand, five hundred one".