28948988 has 6 divisors (see below), whose sum is σ = 50660736. Its totient is φ = 14474492.

The previous prime is 28948987. The next prime is 28949003. The reversal of 28948988 is 88984982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28948981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3618620 + ... + 3618627.

It is an arithmetic number, because the mean of its divisors is an integer number (8443456).

Almost surely, 2^28948988 is an apocalyptic number.

It is an amenable number.

28948988 is a deficient number, since it is larger than the sum of its proper divisors (21711748).

28948988 is a wasteful number, since it uses less digits than its factorization.

28948988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237251 (or 7237249 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 56.

The square root of 28948988 is about 5380.4263771564. The cubic root of 28948988 is about 307.0514331310.

The spelling of 28948988 in words is "twenty-eight million, nine hundred forty-eight thousand, nine hundred eighty-eight".