28550231402 has 64 divisors (see below), whose sum is σ = 58140979200. Its totient is φ = 10174610880.

The previous prime is 28550231401. The next prime is 28550231429. The reversal of 28550231402 is 20413205582.

It is not an unprimeable number, because it can be changed into a prime (28550231401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83378 + ... + 253085.

It is an arithmetic number, because the mean of its divisors is an integer number (908452800).

Almost surely, 2^28550231402 is an apocalyptic number.

28550231402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28550231402 is an abundant number, since it is smaller than the sum of its proper divisors (29590747798).

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

28550231402 is a wasteful number, since it uses less digits than its factorization.

28550231402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336531.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 28550231402 its reverse (20413205582), we get a palindrome (48963436984).

It can be divided in two parts, 28550 and 231402, that added together give a palindrome (259952).

The spelling of 28550231402 in words is "twenty-eight billion, five hundred fifty million, two hundred thirty-one thousand, four hundred two".