28902648 has 64 divisors (see below), whose sum is σ = 76665600. Its totient is φ = 9054720.

The previous prime is 28902619. The next prime is 28902673. The reversal of 28902648 is 84620982.

It is a super-2 number, since 2×28902648² = 1670726122823808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109765 + ... + 110027.

It is an arithmetic number, because the mean of its divisors is an integer number (1197900).

Almost surely, 2^28902648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28902648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38332800).

28902648 is an abundant number, since it is smaller than the sum of its proper divisors (47762952).

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

28902648 is a wasteful number, since it uses less digits than its factorization.

28902648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28902648 is about 5376.1183022698. The cubic root of 28902648 is about 306.8875084325.

The spelling of 28902648 in words is "twenty-eight million, nine hundred two thousand, six hundred forty-eight".