203990384 has 80 divisors (see below), whose sum is σ = 454970880. Its totient is φ = 87816960.

The previous prime is 203990377. The next prime is 203990399. The reversal of 203990384 is 483099302.

It is a super-2 number, since 2×203990384² = 83224153528934912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280229 + ... + 280955.

It is an arithmetic number, because the mean of its divisors is an integer number (5687136).

Almost surely, 2^203990384 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 203990384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227485440).

203990384 is an abundant number, since it is smaller than the sum of its proper divisors (250980496).

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

203990384 is a wasteful number, since it uses less digits than its factorization.

203990384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 203990384 is about 14282.5202257865. The cubic root of 203990384 is about 588.6672820111.

The spelling of 203990384 in words is "two hundred three million, nine hundred ninety thousand, three hundred eighty-four".