28155129160 has 64 divisors (see below), whose sum is σ = 64325606400. Its totient is φ = 11089218816.

The previous prime is 28155129151. The next prime is 28155129199. The reversal of 28155129160 is 6192155182.

It is a super-2 number, since 2×28155129160² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1166737 + ... + 1190623.

It is an arithmetic number, because the mean of its divisors is an integer number (1005087600).

Almost surely, 2^28155129160 is an apocalyptic number.

28155129160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28155129160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32162803200).

28155129160 is an abundant number, since it is smaller than the sum of its proper divisors (36170477240).

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

28155129160 is a wasteful number, since it uses less digits than its factorization.

28155129160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24350 (or 24346 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 28155129160 in words is "twenty-eight billion, one hundred fifty-five million, one hundred twenty-nine thousand, one hundred sixty".