842557872 has 80 divisors (see below), whose sum is σ = 2401283808. Its totient is φ = 252917760.

The previous prime is 842557871. The next prime is 842557879. The reversal of 842557872 is 278755248.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (842557871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9118 + ... + 42050.

Almost surely, 2^842557872 is an apocalyptic number.

842557872 is a gapful number since it is divisible by the number (82) 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 842557872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1200641904).

842557872 is an abundant number, since it is smaller than the sum of its proper divisors (1558725936).

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

842557872 is a wasteful number, since it uses less digits than its factorization.

842557872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32998 (or 32992 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 48.

The square root of 842557872 is about 29026.8474347456. The cubic root of 842557872 is about 944.4955444288.

The spelling of 842557872 in words is "eight hundred forty-two million, five hundred fifty-seven thousand, eight hundred seventy-two".