28649177856 has 108 divisors (see below), whose sum is σ = 88956785008. Its totient is φ = 8815122432.

The previous prime is 28649177831. The next prime is 28649177857. The reversal of 28649177856 is 65877194682.

28649177856 is a `hidden beast` number, since 28 + 6 + 491 + 7 + 78 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28649177793 and 28649177802.

It is not an unprimeable number, because it can be changed into a prime (28649177857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448300 + ... + 508203.

Almost surely, 2^28649177856 is an apocalyptic number.

28649177856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28649177856 is an abundant number, since it is smaller than the sum of its proper divisors (60307607152).

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

28649177856 is a wasteful number, since it uses less digits than its factorization.

28649177856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956538 (or 956521 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 28649177856 in words is "twenty-eight billion, six hundred forty-nine million, one hundred seventy-seven thousand, eight hundred fifty-six".