1634426220 has 96 divisors (see below), whose sum is σ = 5235955200. Its totient is φ = 373169664.

The previous prime is 1634426219. The next prime is 1634426251. The reversal of 1634426220 is 226244361.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 539871 + ... + 542889.

It is an arithmetic number, because the mean of its divisors is an integer number (54541200).

Almost surely, 2^1634426220 is an apocalyptic number.

1634426220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1634426220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2617977600).

1634426220 is an abundant number, since it is smaller than the sum of its proper divisors (3601528980).

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

1634426220 is a wasteful number, since it uses less digits than its factorization.

1634426220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327 (or 4325 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 1634426220 is about 40428.0375482165. The cubic root of 1634426220 is about 1177.9362135331.

The spelling of 1634426220 in words is "one billion, six hundred thirty-four million, four hundred twenty-six thousand, two hundred twenty".