28056155503 has 8 divisors (see below), whose sum is σ = 28185536720. Its totient is φ = 27926881920.

The previous prime is 28056155489. The next prime is 28056155507. The reversal of 28056155503 is 30555165082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28056155503 - 2⁵ = 28056155471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056155507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521176 + ... + 572482.

It is an arithmetic number, because the mean of its divisors is an integer number (3523192090).

Almost surely, 2^28056155503 is an apocalyptic number.

28056155503 is a deficient number, since it is larger than the sum of its proper divisors (129381217).

28056155503 is a wasteful number, since it uses less digits than its factorization.

28056155503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53817.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 28056155503 in words is "twenty-eight billion, fifty-six million, one hundred fifty-five thousand, five hundred three".