84487440 has 160 divisors (see below), whose sum is σ = 276768000. Its totient is φ = 21288960.

The previous prime is 84487439. The next prime is 84487451. The reversal of 84487440 is 4478448.

84487440 is nontrivially palindromic in base 11.

It is a congruent number.

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, 424461 + ... + 424659.

It is an arithmetic number, because the mean of its divisors is an integer number (1729800).

Almost surely, 2^84487440 is an apocalyptic number.

84487440 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 84487440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138384000).

84487440 is an abundant number, since it is smaller than the sum of its proper divisors (192280560).

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

84487440 is a wasteful number, since it uses less digits than its factorization.

84487440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 39.

The square root of 84487440 is about 9191.7049561004. The cubic root of 84487440 is about 438.7974048016.

The spelling of 84487440 in words is "eighty-four million, four hundred eighty-seven thousand, four hundred forty".