851238342 has 64 divisors (see below), whose sum is σ = 2000448000. Its totient is φ = 267564384.

The previous prime is 851238337. The next prime is 851238343. The reversal of 851238342 is 243832158.

851238342 is a `hidden beast` number, since 85 + 1 + 238 + 342 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 851238297 and 851238306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851238343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233143 + ... + 236765.

It is an arithmetic number, because the mean of its divisors is an integer number (31257000).

Almost surely, 2^851238342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851238342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000224000).

851238342 is an abundant number, since it is smaller than the sum of its proper divisors (1149209658).

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

851238342 is a wasteful number, since it uses less digits than its factorization.

851238342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882 (or 3876 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 851238342 is about 29175.9891349034. The cubic root of 851238342 is about 947.7280304590.

The spelling of 851238342 in words is "eight hundred fifty-one million, two hundred thirty-eight thousand, three hundred forty-two".