28945031 has 2 divisors, whose sum is σ = 28945032. Its totient is φ = 28945030.

The previous prime is 28945027. The next prime is 28945043. The reversal of 28945031 is 13054982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28945031 - 2² = 28945027 is a prime.

It is a super-2 number, since 2×28945031² = 1675629639181922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28945001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14472515 + 14472516.

It is an arithmetic number, because the mean of its divisors is an integer number (14472516).

Almost surely, 2^28945031 is an apocalyptic number.

28945031 is a deficient number, since it is larger than the sum of its proper divisors (1).

28945031 is an equidigital number, since it uses as much as digits as its factorization.

28945031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28945031 is about 5380.0586428031. The cubic root of 28945031 is about 307.0374423381.

The spelling of 28945031 in words is "twenty-eight million, nine hundred forty-five thousand, thirty-one".