203829990 has 128 divisors (see below), whose sum is σ = 606735360. Its totient is φ = 42674688.

The previous prime is 203829973. The next prime is 203830001. The reversal of 203829990 is 99928302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 537621 + ... + 537999.

It is an arithmetic number, because the mean of its divisors is an integer number (4740120).

Almost surely, 2^203829990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203829990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303367680).

203829990 is an abundant number, since it is smaller than the sum of its proper divisors (402905370).

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

203829990 is a wasteful number, since it uses less digits than its factorization.

203829990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 203829990 is about 14276.9040761644. The cubic root of 203829990 is about 588.5129553617.

The spelling of 203829990 in words is "two hundred three million, eight hundred twenty-nine thousand, nine hundred ninety".