34155820 has 12 divisors (see below), whose sum is σ = 71727264. Its totient is φ = 13662320.

The previous prime is 34155817. The next prime is 34155827. The reversal of 34155820 is 2855143.

It is not an unprimeable number, because it can be changed into a prime (34155827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 853876 + ... + 853915.

It is an arithmetic number, because the mean of its divisors is an integer number (5977272).

Almost surely, 2^34155820 is an apocalyptic number.

It is an amenable number.

34155820 is an abundant number, since it is smaller than the sum of its proper divisors (37571444).

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

34155820 is a wasteful number, since it uses less digits than its factorization.

34155820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707800 (or 1707798 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 34155820 is about 5844.2980759027. The cubic root of 34155820 is about 324.4553243608.

The spelling of 34155820 in words is "thirty-four million, one hundred fifty-five thousand, eight hundred twenty".