28988308 has 6 divisors (see below), whose sum is σ = 50729546. Its totient is φ = 14494152.

The previous prime is 28988299. The next prime is 28988347. The reversal of 28988308 is 80388982.

It can be written as a sum of positive squares in only one way, i.e., 15460624 + 13527684 = 3932^2 + 3678^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3623535 + ... + 3623542.

Almost surely, 2^28988308 is an apocalyptic number.

It is an amenable number.

28988308 is a deficient number, since it is larger than the sum of its proper divisors (21741238).

28988308 is a wasteful number, since it uses less digits than its factorization.

28988308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247081 (or 7247079 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 28988308 is about 5384.0791227470. The cubic root of 28988308 is about 307.1903879054.

The spelling of 28988308 in words is "twenty-eight million, nine hundred eighty-eight thousand, three hundred eight".