28472359977 has 10 divisors (see below), whose sum is σ = 42532784778. Its totient is φ = 18981573264.

The previous prime is 28472359961. The next prime is 28472360003. The reversal of 28472359977 is 77995327482.

28472359977 is a `hidden beast` number, since 2 + 8 + 472 + 3 + 5 + 99 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18186140736 + 10286219241 = 134856^2 + 101421^2 .

It is not a de Polignac number, because 28472359977 - 2⁴ = 28472359961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28472359957) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 175755228 + ... + 175755389.

Almost surely, 2^28472359977 is an apocalyptic number.

28472359977 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28472359977 is a deficient number, since it is larger than the sum of its proper divisors (14060424801).

28472359977 is an equidigital number, since it uses as much as digits as its factorization.

28472359977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351510629 (or 351510620 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 28472359977 in words is "twenty-eight billion, four hundred seventy-two million, three hundred fifty-nine thousand, nine hundred seventy-seven".