28878953 has 2 divisors, whose sum is σ = 28878954. Its totient is φ = 28878952.

The previous prime is 28878947. The next prime is 28878989. The reversal of 28878953 is 35987882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25482304 + 3396649 = 5048^2 + 1843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28878953 is a prime.

It is not a weakly prime, because it can be changed into another prime (28878923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14439476 + 14439477.

It is an arithmetic number, because the mean of its divisors is an integer number (14439477).

Almost surely, 2^28878953 is an apocalyptic number.

It is an amenable number.

28878953 is a deficient number, since it is larger than the sum of its proper divisors (1).

28878953 is an equidigital number, since it uses as much as digits as its factorization.

28878953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 50.

The square root of 28878953 is about 5373.9141228717. The cubic root of 28878953 is about 306.8036212216.

The spelling of 28878953 in words is "twenty-eight million, eight hundred seventy-eight thousand, nine hundred fifty-three".