28754223777 has 12 divisors (see below), whose sum is σ = 43072170960. Its totient is φ = 19169482356.

The previous prime is 28754223769. The next prime is 28754223779. The reversal of 28754223777 is 77732245782.

28754223777 is a `hidden beast` number, since 2 + 8 + 7 + 542 + 23 + 7 + 77 = 666.

It is not a de Polignac number, because 28754223777 - 2³ = 28754223769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28754223779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59164827 + ... + 59165312.

It is an arithmetic number, because the mean of its divisors is an integer number (3589347580).

Almost surely, 2^28754223777 is an apocalyptic number.

28754223777 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28754223777 is a deficient number, since it is larger than the sum of its proper divisors (14317947183).

28754223777 is an equidigital number, since it uses as much as digits as its factorization.

28754223777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118330154 (or 118330142 counting only the distinct ones).

The product of its digits is 9219840, while the sum is 54.

The spelling of 28754223777 in words is "twenty-eight billion, seven hundred fifty-four million, two hundred twenty-three thousand, seven hundred seventy-seven".