28180438554 has 8 divisors (see below), whose sum is σ = 56360877120. Its totient is φ = 9393479516.

The previous prime is 28180438483. The next prime is 28180438589. The reversal of 28180438554 is 45583408182.

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

28180438554 is an admirable number.

It is a super-2 number, since 2×28180438554² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348369874 + ... + 2348369885.

It is an arithmetic number, because the mean of its divisors is an integer number (7045109640).

Almost surely, 2^28180438554 is an apocalyptic number.

28180438554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28180438554 is a wasteful number, since it uses less digits than its factorization.

28180438554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696739764.

The product of its (nonzero) digits is 1228800, while the sum is 48.

The spelling of 28180438554 in words is "twenty-eight billion, one hundred eighty million, four hundred thirty-eight thousand, five hundred fifty-four".