28486868 has 6 divisors (see below), whose sum is σ = 49852026. Its totient is φ = 14243432.

The previous prime is 28486819. The next prime is 28486877. The reversal of 28486868 is 86868482.

It can be written as a sum of positive squares in only one way, i.e., 28430224 + 56644 = 5332^2 + 238^2 .

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, 3560855 + ... + 3560862.

It is an arithmetic number, because the mean of its divisors is an integer number (8308671).

Almost surely, 2^28486868 is an apocalyptic number.

It is an amenable number.

28486868 is a deficient number, since it is larger than the sum of its proper divisors (21365158).

28486868 is a wasteful number, since it uses less digits than its factorization.

28486868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7121721 (or 7121719 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 50.

The square root of 28486868 is about 5337.3090598166. The cubic root of 28486868 is about 305.4088148637.

The spelling of 28486868 in words is "twenty-eight million, four hundred eighty-six thousand, eight hundred sixty-eight".