28006902 has 96 divisors (see below), whose sum is σ = 76737024. Its totient is φ = 7230960.

The previous prime is 28006897. The next prime is 28006967. The reversal of 28006902 is 20960082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167623 + ... + 167789.

It is an arithmetic number, because the mean of its divisors is an integer number (799344).

Almost surely, 2^28006902 is an apocalyptic number.

28006902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28006902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38368512).

28006902 is an abundant number, since it is smaller than the sum of its proper divisors (48730122).

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

28006902 is a wasteful number, since it uses less digits than its factorization.

28006902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28006902 is about 5292.1547596419. The cubic root of 28006902 is about 303.6838457771.

Adding to 28006902 its reverse (20960082), we get a palindrome (48966984).

The spelling of 28006902 in words is "twenty-eight million, six thousand, nine hundred two".