6403903782 has 16 divisors (see below), whose sum is σ = 12821343552. Its totient is φ = 2132378600.

The previous prime is 6403903763. The next prime is 6403903783. The reversal of 6403903782 is 2873093046.

It is a super-2 number, since 2×6403903782² = 82019967298227807048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403903783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557844 + ... + 569207.

It is an arithmetic number, because the mean of its divisors is an integer number (801333972).

Almost surely, 2^6403903782 is an apocalyptic number.

6403903782 is an abundant number, since it is smaller than the sum of its proper divisors (6417439770).

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

6403903782 is a wasteful number, since it uses less digits than its factorization.

6403903782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128003.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 6403903782 is about 80024.3949180498. The cubic root of 6403903782 is about 1857.0129515294.

The spelling of 6403903782 in words is "six billion, four hundred three million, nine hundred three thousand, seven hundred eighty-two".