84231240 has 128 divisors (see below), whose sum is σ = 264625920. Its totient is φ = 21427200.

The previous prime is 84231239. The next prime is 84231263. The reversal of 84231240 is 4213248.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 84231240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270685 + ... + 270995.

It is an arithmetic number, because the mean of its divisors is an integer number (2067390).

Almost surely, 2^84231240 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 84231240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132312960).

84231240 is an abundant number, since it is smaller than the sum of its proper divisors (180394680).

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

84231240 is a wasteful number, since it uses less digits than its factorization.

84231240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 84231240 is about 9177.7578961313. The cubic root of 84231240 is about 438.3534188036.

Adding to 84231240 its reverse (4213248), we get a palindrome (88444488).

The spelling of 84231240 in words is "eighty-four million, two hundred thirty-one thousand, two hundred forty".