834147720 has 160 divisors (see below), whose sum is σ = 3204273600. Its totient is φ = 190657152.

The previous prime is 834147701. The next prime is 834147767. The reversal of 834147720 is 27741438.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4291 + ... + 41069.

It is an arithmetic number, because the mean of its divisors is an integer number (20026710).

Almost surely, 2^834147720 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 834147720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602136800).

834147720 is an abundant number, since it is smaller than the sum of its proper divisors (2370125880).

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

834147720 is a wasteful number, since it uses less digits than its factorization.

834147720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36809 (or 36796 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 834147720 is about 28881.6156057794. The cubic root of 834147720 is about 941.3424759540.

The spelling of 834147720 in words is "eight hundred thirty-four million, one hundred forty-seven thousand, seven hundred twenty".