834378140 has 24 divisors (see below), whose sum is σ = 1812615840. Its totient is φ = 322242368.

The previous prime is 834378137. The next prime is 834378161. The reversal of 834378140 is 41873438.

It is a junction number, because it is equal to n+sod(n) for n = 834378094 and 834378103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718712 + ... + 719871.

It is an arithmetic number, because the mean of its divisors is an integer number (75525660).

Almost surely, 2^834378140 is an apocalyptic number.

It is an amenable number.

834378140 is an abundant number, since it is smaller than the sum of its proper divisors (978237700).

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

834378140 is a wasteful number, since it uses less digits than its factorization.

834378140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438621 (or 1438619 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 834378140 is about 28885.6043731129. The cubic root of 834378140 is about 941.4291449213.

The spelling of 834378140 in words is "eight hundred thirty-four million, three hundred seventy-eight thousand, one hundred forty".