83870454420 has 144 divisors (see below), whose sum is σ = 258371939280. Its totient is φ = 22019309568.

The previous prime is 83870454407. The next prime is 83870454427. The reversal of 83870454420 is 2445407838.

It is a happy number.

83870454420 is a `hidden beast` number, since 8 + 3 + 87 + 0 + 4 + 544 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 26207076996 + 57663377424 = 161886^2 + 240132^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83870454427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3357336 + ... + 3382224.

Almost surely, 2^83870454420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83870454420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129185969640).

83870454420 is an abundant number, since it is smaller than the sum of its proper divisors (174501484860).

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

83870454420 is a wasteful number, since it uses less digits than its factorization.

83870454420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25194 (or 25189 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 83870454420 in words is "eighty-three billion, eight hundred seventy million, four hundred fifty-four thousand, four hundred twenty".