28207706554 has 4 divisors (see below), whose sum is σ = 42311559834. Its totient is φ = 14103853276.

The previous prime is 28207706537. The next prime is 28207706557. The reversal of 28207706554 is 45560770282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27220050225 + 987656329 = 164985^2 + 31427^2 .

It is not an unprimeable number, because it can be changed into a prime (28207706557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7051926637 + ... + 7051926640.

Almost surely, 2^28207706554 is an apocalyptic number.

28207706554 is a deficient number, since it is larger than the sum of its proper divisors (14103853280).

28207706554 is a wasteful number, since it uses less digits than its factorization.

28207706554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14103853279.

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 28207706554 in words is "twenty-eight billion, two hundred seven million, seven hundred six thousand, five hundred fifty-four".