840799872 has 256 divisors, whose sum is σ = 2868566400. Its totient is φ = 239616000.

The previous prime is 840799867. The next prime is 840799903. The reversal of 840799872 is 278997048.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 645622 + ... + 646922.

Almost surely, 2^840799872 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 840799872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434283200).

840799872 is an abundant number, since it is smaller than the sum of its proper divisors (2027766528).

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

840799872 is a wasteful number, since it uses less digits than its factorization.

840799872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352 (or 1334 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 840799872 is about 28996.5493119440. The cubic root of 840799872 is about 943.8381892531.

The spelling of 840799872 in words is "eight hundred forty million, seven hundred ninety-nine thousand, eight hundred seventy-two".