28154133187 has 8 divisors (see below), whose sum is σ = 28663968960. Its totient is φ = 27645855360.

The previous prime is 28154133149. The next prime is 28154133193. The reversal of 28154133187 is 78133145182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28154133187 is a prime.

It is a super-2 number, since 2×28154133187² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28154133587) 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, 352987 + ... + 425332.

It is an arithmetic number, because the mean of its divisors is an integer number (3582996120).

Almost surely, 2^28154133187 is an apocalyptic number.

28154133187 is a deficient number, since it is larger than the sum of its proper divisors (509835773).

28154133187 is an equidigital number, since it uses as much as digits as its factorization.

28154133187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778973.

The product of its digits is 161280, while the sum is 43.

The spelling of 28154133187 in words is "twenty-eight billion, one hundred fifty-four million, one hundred thirty-three thousand, one hundred eighty-seven".