28640152 has 16 divisors (see below), whose sum is σ = 56035440. Its totient is φ = 13697376.

The previous prime is 28640147. The next prime is 28640167. The reversal of 28640152 is 25104682.

It is a self number, because there is not a number n which added to its sum of digits gives 28640152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77643 + ... + 78010.

It is an arithmetic number, because the mean of its divisors is an integer number (3502215).

Almost surely, 2^28640152 is an apocalyptic number.

It is an amenable number.

28640152 is a deficient number, since it is larger than the sum of its proper divisors (27395288).

28640152 is a wasteful number, since it uses less digits than its factorization.

28640152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155682 (or 155678 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28640152 is about 5351.6494653518. The cubic root of 28640152 is about 305.9556231658.

The spelling of 28640152 in words is "twenty-eight million, six hundred forty thousand, one hundred fifty-two".