28102288401 has 24 divisors (see below), whose sum is σ = 44288390016. Its totient is φ = 17029383840.

The previous prime is 28102288399. The next prime is 28102288477. The reversal of 28102288401 is 10488220182.

28102288401 is a `hidden beast` number, since 28 + 1 + 0 + 228 + 8 + 401 = 666.

It is not a de Polignac number, because 28102288401 - 2¹ = 28102288399 is a prime.

It is a super-2 number, since 2×28102288401² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28102288001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 973096 + ... + 1001558.

It is an arithmetic number, because the mean of its divisors is an integer number (1845349584).

Almost surely, 2^28102288401 is an apocalyptic number.

It is an amenable number.

28102288401 is a deficient number, since it is larger than the sum of its proper divisors (16186101615).

28102288401 is a wasteful number, since it uses less digits than its factorization.

28102288401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38453 (or 38450 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The spelling of 28102288401 in words is "twenty-eight billion, one hundred two million, two hundred eighty-eight thousand, four hundred one".