9834663420 has 72 divisors (see below), whose sum is σ = 29910731760. Its totient is φ = 2615639040.

The previous prime is 9834663409. The next prime is 9834663427. The reversal of 9834663420 is 243664389.

9834663420 is a `hidden beast` number, since 9 + 8 + 3 + 4 + 6 + 634 + 2 + 0 = 666.

It is a super-3 number, since 3×9834663420³ (a number of 31 digits) contains 333 as substring.

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 (9834663427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3861 + ... + 140300.

It is an arithmetic number, because the mean of its divisors is an integer number (415426830).

Almost surely, 2^9834663420 is an apocalyptic number.

9834663420 is a gapful number since it is divisible by the number (90) 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 9834663420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14955365880).

9834663420 is an abundant number, since it is smaller than the sum of its proper divisors (20076068340).

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

9834663420 is a wasteful number, since it uses less digits than its factorization.

9834663420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144555 (or 144550 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The square root of 9834663420 is about 99169.8715336468. The cubic root of 9834663420 is about 2142.4950823339.

The spelling of 9834663420 in words is "nine billion, eight hundred thirty-four million, six hundred sixty-three thousand, four hundred twenty".