842146840 has 48 divisors (see below), whose sum is σ = 1980846000. Its totient is φ = 322204608.

The previous prime is 842146819. The next prime is 842146859. The reversal of 842146840 is 48641248.

It is a super-2 number, since 2×842146840² = 1418422600243971200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 842146840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261 + ... + 41059.

It is an arithmetic number, because the mean of its divisors is an integer number (41267625).

Almost surely, 2^842146840 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 842146840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990423000).

842146840 is an abundant number, since it is smaller than the sum of its proper divisors (1138699160).

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

842146840 is a wasteful number, since it uses less digits than its factorization.

842146840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39856 (or 39829 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 842146840 is about 29019.7663670816. The cubic root of 842146840 is about 944.3419324132.

The spelling of 842146840 in words is "eight hundred forty-two million, one hundred forty-six thousand, eight hundred forty".