28147608 has 64 divisors (see below), whose sum is σ = 78796800. Its totient is φ = 9309600.

The previous prime is 28147591. The next prime is 28147633. The reversal of 28147608 is 80674182.

28147608 is a `hidden beast` number, since 2 + 8 + 1 + 47 + 608 = 666.

It is a super-2 number, since 2×28147608² = 1584575672243328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 32185 + ... + 33047.

It is an arithmetic number, because the mean of its divisors is an integer number (1231200).

Almost surely, 2^28147608 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 28147608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39398400).

28147608 is an abundant number, since it is smaller than the sum of its proper divisors (50649192).

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

28147608 is a wasteful number, since it uses less digits than its factorization.

28147608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28147608 is about 5305.4319334056. The cubic root of 28147608 is about 304.1915632422.

The spelling of 28147608 in words is "twenty-eight million, one hundred forty-seven thousand, six hundred eight".