28112287401 has 48 divisors (see below), whose sum is σ = 45219695040. Its totient is φ = 16684536960.

The previous prime is 28112287397. The next prime is 28112287403. The reversal of 28112287401 is 10478221182.

It is a happy number.

28112287401 is a `hidden beast` number, since 28 + 1 + 1 + 228 + 7 + 401 = 666.

It is not a de Polignac number, because 28112287401 - 2² = 28112287397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28112287403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2917770 + ... + 2927388.

It is an arithmetic number, because the mean of its divisors is an integer number (942076980).

Almost surely, 2^28112287401 is an apocalyptic number.

It is an amenable number.

28112287401 is a deficient number, since it is larger than the sum of its proper divisors (17107407639).

28112287401 is a wasteful number, since it uses less digits than its factorization.

28112287401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10246 (or 10243 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

It can be divided in two parts, 28112 and 287401, that added together give a palindrome (315513).

The spelling of 28112287401 in words is "twenty-eight billion, one hundred twelve million, two hundred eighty-seven thousand, four hundred one".