28110623402 has 4 divisors (see below), whose sum is σ = 42165935106. Its totient is φ = 14055311700.

The previous prime is 28110623363. The next prime is 28110623407. The reversal of 28110623402 is 20432601182.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18763794361 + 9346829041 = 136981^2 + 96679^2 .

It is not an unprimeable number, because it can be changed into a prime (28110623407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7027655849 + ... + 7027655852.

Almost surely, 2^28110623402 is an apocalyptic number.

28110623402 is a deficient number, since it is larger than the sum of its proper divisors (14055311704).

28110623402 is a wasteful number, since it uses less digits than its factorization.

28110623402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14055311703.

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 28110623402 in words is "twenty-eight billion, one hundred ten million, six hundred twenty-three thousand, four hundred two".