84134720 has 56 divisors (see below), whose sum is σ = 201131424. Its totient is φ = 33522176.

The previous prime is 84134719. The next prime is 84134723. The reversal of 84134720 is 2743148.

It is a super-2 number, since 2×84134720² = 14157302218956800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84134723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149159 + ... + 149721.

Almost surely, 2^84134720 is an apocalyptic number.

84134720 is a gapful number since it is divisible by the number (80) 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 84134720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100565712).

84134720 is an abundant number, since it is smaller than the sum of its proper divisors (116996704).

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

84134720 is a wasteful number, since it uses less digits than its factorization.

84134720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 84134720 is about 9172.4980239845. The cubic root of 84134720 is about 438.1859194168.

Adding to 84134720 its reverse (2743148), we get a palindrome (86877868).

The spelling of 84134720 in words is "eighty-four million, one hundred thirty-four thousand, seven hundred twenty".