203891064 has 96 divisors (see below), whose sum is σ = 584619120. Its totient is φ = 59025408.

The previous prime is 203891063. The next prime is 203891069. The reversal of 203891064 is 460198302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203891063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67474 + ... + 70430.

Almost surely, 2^203891064 is an apocalyptic number.

203891064 is a gapful number since it is divisible by the number (24) 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 203891064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292309560).

203891064 is an abundant number, since it is smaller than the sum of its proper divisors (380728056).

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

203891064 is a wasteful number, since it uses less digits than its factorization.

203891064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009 (or 2992 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 203891064 is about 14279.0428250636. The cubic root of 203891064 is about 588.5717286085.

The spelling of 203891064 in words is "two hundred three million, eight hundred ninety-one thousand, sixty-four".