6433894940 has 48 divisors (see below), whose sum is σ = 14764377600. Its totient is φ = 2335644480.

The previous prime is 6433894891. The next prime is 6433894991. The reversal of 6433894940 is 494983346.

It is a super-4 number, since 4×6433894940⁴ (a number of 40 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107369 + ... + 156191.

It is an arithmetic number, because the mean of its divisors is an integer number (307591200).

Almost surely, 2^6433894940 is an apocalyptic number.

It is an amenable number.

6433894940 is an abundant number, since it is smaller than the sum of its proper divisors (8330482660).

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

6433894940 is a wasteful number, since it uses less digits than its factorization.

6433894940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49442 (or 49440 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 50.

The square root of 6433894940 is about 80211.5636301899. The cubic root of 6433894940 is about 1859.9073970161.

The spelling of 6433894940 in words is "six billion, four hundred thirty-three million, eight hundred ninety-four thousand, nine hundred forty".