84351240 has 128 divisors (see below), whose sum is σ = 284860800. Its totient is φ = 22199040.

The previous prime is 84351193. The next prime is 84351247. The reversal of 84351240 is 4215348.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (84351247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89170 + ... + 90110.

It is an arithmetic number, because the mean of its divisors is an integer number (2225475).

Almost surely, 2^84351240 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 84351240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142430400).

84351240 is an abundant number, since it is smaller than the sum of its proper divisors (200509560).

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

84351240 is a wasteful number, since it uses less digits than its factorization.

84351240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 84351240 is about 9184.2931137894. The cubic root of 84351240 is about 438.5614866971.

Adding to 84351240 its reverse (4215348), we get a palindrome (88566588).

The spelling of 84351240 in words is "eighty-four million, three hundred fifty-one thousand, two hundred forty".