28662857547 has 16 divisors (see below), whose sum is σ = 38442178560. Its totient is φ = 18996184800.

The previous prime is 28662857543. The next prime is 28662857557. The reversal of 28662857547 is 74575826682.

It is not a de Polignac number, because 28662857547 - 2² = 28662857543 is a prime.

It is a super-2 number, since 2×28662857547² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28662857543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913404 + ... + 944262.

It is an arithmetic number, because the mean of its divisors is an integer number (2402636160).

Almost surely, 2^28662857547 is an apocalyptic number.

28662857547 is a deficient number, since it is larger than the sum of its proper divisors (9779321013).

28662857547 is a wasteful number, since it uses less digits than its factorization.

28662857547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32674.

The product of its digits is 45158400, while the sum is 60.

The spelling of 28662857547 in words is "twenty-eight billion, six hundred sixty-two million, eight hundred fifty-seven thousand, five hundred forty-seven".