234220135890 has 128 divisors (see below), whose sum is σ = 627709824000. Its totient is φ = 55535800320.

The previous prime is 234220135889. The next prime is 234220135907. The reversal of 234220135890 is 98531022432.

234220135890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4850586 + ... + 4898634.

It is an arithmetic number, because the mean of its divisors is an integer number (4903983000).

Almost surely, 2^234220135890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 234220135890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313854912000).

234220135890 is an abundant number, since it is smaller than the sum of its proper divisors (393489688110).

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

234220135890 is a wasteful number, since it uses less digits than its factorization.

234220135890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48532.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 234220135890 in words is "two hundred thirty-four billion, two hundred twenty million, one hundred thirty-five thousand, eight hundred ninety".