28988051 has 4 divisors (see below), whose sum is σ = 29055432. Its totient is φ = 28920672.

The previous prime is 28988039. The next prime is 28988117. The reversal of 28988051 is 15088982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15088982 = 2 ⋅7544491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28988051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28988251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33041 + ... + 33906.

It is an arithmetic number, because the mean of its divisors is an integer number (7263858).

Almost surely, 2^28988051 is an apocalyptic number.

28988051 is a deficient number, since it is larger than the sum of its proper divisors (67381).

28988051 is an equidigital number, since it uses as much as digits as its factorization.

28988051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67380.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 28988051 is about 5384.0552560315. The cubic root of 28988051 is about 307.1894800893.

The spelling of 28988051 in words is "twenty-eight million, nine hundred eighty-eight thousand, fifty-one".