28158972403 has 8 divisors (see below), whose sum is σ = 28187094528. Its totient is φ = 28130868744.

The previous prime is 28158972383. The next prime is 28158972467. The reversal of 28158972403 is 30427985182.

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 28158972403 - 2⁵ = 28158972371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28158972493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8129650 + ... + 8133112.

It is an arithmetic number, because the mean of its divisors is an integer number (3523386816).

Almost surely, 2^28158972403 is an apocalyptic number.

28158972403 is a deficient number, since it is larger than the sum of its proper divisors (28122125).

28158972403 is a wasteful number, since it uses less digits than its factorization.

28158972403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9233.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 28158972403 in words is "twenty-eight billion, one hundred fifty-eight million, nine hundred seventy-two thousand, four hundred three".