84257872440 has 64 divisors (see below), whose sum is σ = 288884136960. Its totient is φ = 19258942080.

The previous prime is 84257872403. The next prime is 84257872451. The reversal of 84257872440 is 4427875248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50152656 + ... + 50154335.

It is an arithmetic number, because the mean of its divisors is an integer number (4513814640).

Almost surely, 2^84257872440 is an apocalyptic number.

It is an amenable number.

84257872440 is an abundant number, since it is smaller than the sum of its proper divisors (204626264520).

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

84257872440 is a wasteful number, since it uses less digits than its factorization.

84257872440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100307012 (or 100307008 counting only the distinct ones).

The product of its (nonzero) digits is 4014080, while the sum is 51.

The spelling of 84257872440 in words is "eighty-four billion, two hundred fifty-seven million, eight hundred seventy-two thousand, four hundred forty".