28550046780 has 96 divisors (see below), whose sum is σ = 89461612800. Its totient is φ = 7558553664.

The previous prime is 28550046773. The next prime is 28550046799. The reversal of 28550046780 is 8764005582.

28550046780 is a `hidden beast` number, since 2 + 8 + 5 + 500 + 4 + 67 + 80 = 666.

It is a super-2 number, since 2×28550046780² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115122 + ... + 265241.

It is an arithmetic number, because the mean of its divisors is an integer number (931891800).

Almost surely, 2^28550046780 is an apocalyptic number.

28550046780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28550046780 is an abundant number, since it is smaller than the sum of its proper divisors (60911566020).

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

28550046780 is a wasteful number, since it uses less digits than its factorization.

28550046780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380520 (or 380512 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 28550046780 in words is "twenty-eight billion, five hundred fifty million, forty-six thousand, seven hundred eighty".