804638142 has 144 divisors (see below), whose sum is σ = 2218376160. Its totient is φ = 206300160.

The previous prime is 804638137. The next prime is 804638207. The reversal of 804638142 is 241836408.

804638142 is a `hidden beast` number, since 8 + 0 + 4 + 638 + 14 + 2 = 666.

It is a super-2 number, since 2×804638142² = 1294885079122424328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 804638097 and 804638106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1356598 + ... + 1357190.

It is an arithmetic number, because the mean of its divisors is an integer number (15405390).

Almost surely, 2^804638142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 804638142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109188080).

804638142 is an abundant number, since it is smaller than the sum of its proper divisors (1413738018).

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

804638142 is a wasteful number, since it uses less digits than its factorization.

804638142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 804638142 is about 28366.1442920958. The cubic root of 804638142 is about 930.1083397892.

The spelling of 804638142 in words is "eight hundred four million, six hundred thirty-eight thousand, one hundred forty-two".