28779152 has 10 divisors (see below), whose sum is σ = 55759638. Its totient is φ = 14389568.

The previous prime is 28779143. The next prime is 28779173. The reversal of 28779152 is 25197782.

It can be written as a sum of positive squares in only one way, i.e., 28686736 + 92416 = 5356^2 + 304^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899333 + ... + 899364.

Almost surely, 2^28779152 is an apocalyptic number.

It is an amenable number.

28779152 is a deficient number, since it is larger than the sum of its proper divisors (26980486).

28779152 is a wasteful number, since it uses less digits than its factorization.

28779152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798705 (or 1798699 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 28779152 is about 5364.6203966357. The cubic root of 28779152 is about 306.4497920521.

The spelling of 28779152 in words is "twenty-eight million, seven hundred seventy-nine thousand, one hundred fifty-two".