142889597820 has 144 divisors (see below), whose sum is σ = 461235902400. Its totient is φ = 35682121728.

The previous prime is 142889597801. The next prime is 142889597833. The reversal of 142889597820 is 28795988241.

142889597820 is a `hidden beast` number, since 1 + 428 + 89 + 59 + 7 + 82 + 0 = 666.

It is a super-2 number, since 2×142889597820² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 491614 + ... + 726266.

It is an arithmetic number, because the mean of its divisors is an integer number (3203027100).

Almost surely, 2^142889597820 is an apocalyptic number.

142889597820 is a gapful number since it is divisible by the number (10) 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 142889597820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230617951200).

142889597820 is an abundant number, since it is smaller than the sum of its proper divisors (318346304580).

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

142889597820 is a wasteful number, since it uses less digits than its factorization.

142889597820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234884 (or 234879 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 142889597820 in words is "one hundred forty-two billion, eight hundred eighty-nine million, five hundred ninety-seven thousand, eight hundred twenty".