28128072142 has 8 divisors (see below), whose sum is σ = 43332435576. Its totient is φ = 13683926952.

The previous prime is 28128072139. The next prime is 28128072149. The reversal of 28128072142 is 24127082182.

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

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128072149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190054468 + ... + 190054615.

It is an arithmetic number, because the mean of its divisors is an integer number (5416554447).

Almost surely, 2^28128072142 is an apocalyptic number.

28128072142 is a deficient number, since it is larger than the sum of its proper divisors (15204363434).

28128072142 is a wasteful number, since it uses less digits than its factorization.

28128072142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380109122.

The product of its (nonzero) digits is 28672, while the sum is 37.

The spelling of 28128072142 in words is "twenty-eight billion, one hundred twenty-eight million, seventy-two thousand, one hundred forty-two".