28304052240 has 80 divisors (see below), whose sum is σ = 92360606400. Its totient is φ = 7150496256.

The previous prime is 28304052211. The next prime is 28304052311. The reversal of 28304052240 is 4225040382.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×28304052240² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28304052198 and 28304052207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3098955 + ... + 3108074.

It is an arithmetic number, because the mean of its divisors is an integer number (1154507580).

Almost surely, 2^28304052240 is an apocalyptic number.

28304052240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28304052240 is an abundant number, since it is smaller than the sum of its proper divisors (64056554160).

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

28304052240 is a wasteful number, since it uses less digits than its factorization.

28304052240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207064 (or 6207058 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The spelling of 28304052240 in words is "twenty-eight billion, three hundred four million, fifty-two thousand, two hundred forty".