2003864381 has 16 divisors (see below), whose sum is σ = 2092243440. Its totient is φ = 1917665280.

The previous prime is 2003864353. The next prime is 2003864383. The reversal of 2003864381 is 1834683002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 815959225 + 1187905156 = 28565^2 + 34466^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003864381 - 2¹⁰ = 2003863357 is a prime.

It is a super-2 number, since 2×2003864381² = 8030944914881026322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003864383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575915 + ... + 579383.

It is an arithmetic number, because the mean of its divisors is an integer number (130765215).

Almost surely, 2^2003864381 is an apocalyptic number.

It is an amenable number.

2003864381 is a deficient number, since it is larger than the sum of its proper divisors (88379059).

2003864381 is a wasteful number, since it uses less digits than its factorization.

2003864381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 2003864381 is about 44764.5437930512. The cubic root of 2003864381 is about 1260.7319969786.

The spelling of 2003864381 in words is "two billion, three million, eight hundred sixty-four thousand, three hundred eighty-one".