28666902 has 16 divisors (see below), whose sum is σ = 62546112. Its totient is φ = 8686920.

The previous prime is 28666843. The next prime is 28666903. The reversal of 28666902 is 20966682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28666903) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 217108 + ... + 217239.

It is an arithmetic number, because the mean of its divisors is an integer number (3909132).

Almost surely, 2^28666902 is an apocalyptic number.

28666902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28666902 is an abundant number, since it is smaller than the sum of its proper divisors (33879210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28666902 is a wasteful number, since it uses less digits than its factorization.

28666902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434363.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28666902 is about 5354.1481115113. The cubic root of 28666902 is about 306.0508480583.

The spelling of 28666902 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred two".