28934831 has 2 divisors, whose sum is σ = 28934832. Its totient is φ = 28934830.

The previous prime is 28934803. The next prime is 28934869. The reversal of 28934831 is 13843982.

It is an a-pointer prime, because the next prime (28934869) can be obtained adding 28934831 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28934831 is a prime.

It is a super-3 number, since 3×28934831³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28934881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14467415 + 14467416.

It is an arithmetic number, because the mean of its divisors is an integer number (14467416).

Almost surely, 2^28934831 is an apocalyptic number.

28934831 is a deficient number, since it is larger than the sum of its proper divisors (1).

28934831 is an equidigital number, since it uses as much as digits as its factorization.

28934831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 28934831 is about 5379.1106142187. The cubic root of 28934831 is about 307.0013722454.

The spelling of 28934831 in words is "twenty-eight million, nine hundred thirty-four thousand, eight hundred thirty-one".