28056442155 has 16 divisors (see below), whose sum is σ = 51303208704. Its totient is φ = 12825802080.

The previous prime is 28056442111. The next prime is 28056442159. The reversal of 28056442155 is 55124465082.

It is not a de Polignac number, because 28056442155 - 2¹⁰ = 28056441131 is a prime.

It is a super-2 number, since 2×28056442155² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28056442159) 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, 133602001 + ... + 133602210.

It is an arithmetic number, because the mean of its divisors is an integer number (3206450544).

Almost surely, 2^28056442155 is an apocalyptic number.

28056442155 is a deficient number, since it is larger than the sum of its proper divisors (23246766549).

28056442155 is a wasteful number, since it uses less digits than its factorization.

28056442155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267204226.

The product of its (nonzero) digits is 384000, while the sum is 42.

The spelling of 28056442155 in words is "twenty-eight billion, fifty-six million, four hundred forty-two thousand, one hundred fifty-five".