28350309204 has 48 divisors (see below), whose sum is σ = 84000918400. Its totient is φ = 8100088128.

The previous prime is 28350309191. The next prime is 28350309209. The reversal of 28350309204 is 40290305382.

28350309204 is a `hidden beast` number, since 283 + 50 + 309 + 20 + 4 = 666.

It is a super-2 number, since 2×28350309204² (a number of 22 digits) 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 not an unprimeable number, because it can be changed into a prime (28350309209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18749449 + ... + 18750960.

Almost surely, 2^28350309204 is an apocalyptic number.

It is an amenable number.

28350309204 is an abundant number, since it is smaller than the sum of its proper divisors (55650609196).

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

28350309204 is a wasteful number, since it uses less digits than its factorization.

28350309204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37500429 (or 37500421 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 28350309204 in words is "twenty-eight billion, three hundred fifty million, three hundred nine thousand, two hundred four".