28461668 has 6 divisors (see below), whose sum is σ = 49807926. Its totient is φ = 14230832.

The previous prime is 28461637. The next prime is 28461691. The reversal of 28461668 is 86616482.

It can be written as a sum of positive squares in only one way, i.e., 28111204 + 350464 = 5302^2 + 592^2 .

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, 3557705 + ... + 3557712.

It is an arithmetic number, because the mean of its divisors is an integer number (8301321).

Almost surely, 2^28461668 is an apocalyptic number.

It is an amenable number.

28461668 is a deficient number, since it is larger than the sum of its proper divisors (21346258).

28461668 is a wasteful number, since it uses less digits than its factorization.

28461668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115421 (or 7115419 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 28461668 is about 5334.9477973079. The cubic root of 28461668 is about 305.3187315702.

The spelling of 28461668 in words is "twenty-eight million, four hundred sixty-one thousand, six hundred sixty-eight".