16122142728 has 48 divisors (see below), whose sum is σ = 43677204480. Its totient is φ = 5372439264.

The previous prime is 16122142727. The next prime is 16122142741. The reversal of 16122142728 is 82724122161.

16122142728 is a `hidden beast` number, since 1 + 6 + 1 + 221 + 427 + 2 + 8 = 666.

It is a Cunningham number, because it is equal to 126973²-1.

It is a super-2 number, since 2×16122142728² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16122142692 and 16122142701.

It is not an unprimeable number, because it can be changed into a prime (16122142723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222201 + ... + 285687.

It is an arithmetic number, because the mean of its divisors is an integer number (909941760).

Almost surely, 2^16122142728 is an apocalyptic number.

16122142728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16122142728 is an abundant number, since it is smaller than the sum of its proper divisors (27555061752).

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

16122142728 is a wasteful number, since it uses less digits than its factorization.

16122142728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67026 (or 67019 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

Adding to 16122142728 its reverse (82724122161), we get a palindrome (98846264889).

The spelling of 16122142728 in words is "sixteen billion, one hundred twenty-two million, one hundred forty-two thousand, seven hundred twenty-eight".