28155036508 has 6 divisors (see below), whose sum is σ = 49271313896. Its totient is φ = 14077518252.

The previous prime is 28155036491. The next prime is 28155036509. The reversal of 28155036508 is 80563055182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28155036509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3519379560 + ... + 3519379567.

Almost surely, 2^28155036508 is an apocalyptic number.

It is an amenable number.

28155036508 is a deficient number, since it is larger than the sum of its proper divisors (21116277388).

28155036508 is a wasteful number, since it uses less digits than its factorization.

28155036508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038759131 (or 7038759129 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 28155036508 in words is "twenty-eight billion, one hundred fifty-five million, thirty-six thousand, five hundred eight".