228689492402 has 90 divisors (see below), whose sum is σ = 410227241823. Its totient is φ = 95609600856.

The previous prime is 228689492363. The next prime is 228689492417. The reversal of 228689492402 is 204294986822.

It can be written as a sum of positive squares in only one way, i.e., 114344746201 + 114344746201 = 338149^2 + 338149^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=338149.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2220286283 + ... + 2220286385.

Almost surely, 2^228689492402 is an apocalyptic number.

228689492402 is a deficient number, since it is larger than the sum of its proper divisors (181537749421).

228689492402 is an frugal number, since it uses more digits than its factorization.

228689492402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 228689492402 in words is "two hundred twenty-eight billion, six hundred eighty-nine million, four hundred ninety-two thousand, four hundred two".