842172630 has 96 divisors (see below), whose sum is σ = 2240130816. Its totient is φ = 202430592.

The previous prime is 842172619. The next prime is 842172631. The reversal of 842172630 is 36271248.

It is a super-2 number, since 2×842172630² = 1418509477442233800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 842172591 and 842172600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842172631) 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 47 ways as a sum of consecutive naturals, for example, 216079 + ... + 219941.

It is an arithmetic number, because the mean of its divisors is an integer number (23334696).

Almost surely, 2^842172630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842172630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120065408).

842172630 is an abundant number, since it is smaller than the sum of its proper divisors (1397958186).

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

842172630 is a wasteful number, since it uses less digits than its factorization.

842172630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942 (or 3929 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 842172630 is about 29020.2107159821. The cubic root of 842172630 is about 944.3515721928.

The spelling of 842172630 in words is "eight hundred forty-two million, one hundred seventy-two thousand, six hundred thirty".