28155571026 has 32 divisors (see below), whose sum is σ = 64101224448. Its totient is φ = 8161034640.

The previous prime is 28155570977. The next prime is 28155571027. The reversal of 28155571026 is 62017555182.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28155571027) 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 in 15 ways as a sum of consecutive naturals, for example, 9272386 + ... + 9275421.

It is an arithmetic number, because the mean of its divisors is an integer number (2003163264).

Almost surely, 2^28155571026 is an apocalyptic number.

28155571026 is an abundant number, since it is smaller than the sum of its proper divisors (35945653422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28155571026 is a wasteful number, since it uses less digits than its factorization.

28155571026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18547846.

The product of its (nonzero) digits is 168000, while the sum is 42.

The spelling of 28155571026 in words is "twenty-eight billion, one hundred fifty-five million, five hundred seventy-one thousand, twenty-six".