3440520840 has 64 divisors (see below), whose sum is σ = 10466962560. Its totient is φ = 904547840.

The previous prime is 3440520829. The next prime is 3440520847. The reversal of 3440520840 is 480250443.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3440520798 and 3440520807.

It is not an unprimeable number, because it can be changed into a prime (3440520847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193389 + ... + 210428.

It is an arithmetic number, because the mean of its divisors is an integer number (163546290).

Almost surely, 2^3440520840 is an apocalyptic number.

3440520840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3440520840 is an abundant number, since it is smaller than the sum of its proper divisors (7026441720).

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

3440520840 is a wasteful number, since it uses less digits than its factorization.

3440520840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403902 (or 403898 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 3440520840 is about 58655.9531505541. The cubic root of 3440520840 is about 1509.6446454118.

The spelling of 3440520840 in words is "three billion, four hundred forty million, five hundred twenty thousand, eight hundred forty".