28640358 has 32 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 9490248.

The previous prime is 28640347. The next prime is 28640377. The reversal of 28640358 is 85304682.

28640358 is a `hidden beast` number, since 2 + 8 + 640 + 3 + 5 + 8 = 666.

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 15 ways as a sum of consecutive naturals, for example, 8185 + ... + 11147.

It is an arithmetic number, because the mean of its divisors is an integer number (2000700).

Almost surely, 2^28640358 is an apocalyptic number.

28640358 is an abundant number, since it is smaller than the sum of its proper divisors (35382042).

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

28640358 is a wasteful number, since it uses less digits than its factorization.

28640358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 28640358 is about 5351.6687117197. The cubic root of 28640358 is about 305.9563567130.

The spelling of 28640358 in words is "twenty-eight million, six hundred forty thousand, three hundred fifty-eight".