3909049440 has 48 divisors (see below), whose sum is σ = 12313507248. Its totient is φ = 1042413056.

The previous prime is 3909049421. The next prime is 3909049447. The reversal of 3909049440 is 449409093.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3909049392 and 3909049401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909049447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4071447 + ... + 4072406.

It is an arithmetic number, because the mean of its divisors is an integer number (256531401).

Almost surely, 2^3909049440 is an apocalyptic number.

3909049440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3909049440 is an abundant number, since it is smaller than the sum of its proper divisors (8404457808).

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

3909049440 is a wasteful number, since it uses less digits than its factorization.

3909049440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8143871 (or 8143863 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 3909049440 is about 62522.3915089626. The cubic root of 3909049440 is about 1575.2774436915.

The spelling of 3909049440 in words is "three billion, nine hundred nine million, forty-nine thousand, four hundred forty".