3645439420 has 48 divisors (see below), whose sum is σ = 9031292928. Its totient is φ = 1209545280.

The previous prime is 3645439411. The next prime is 3645439507. The reversal of 3645439420 is 249345463.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 415642 + ... + 424321.

It is an arithmetic number, because the mean of its divisors is an integer number (188151936).

Almost surely, 2^3645439420 is an apocalyptic number.

It is an amenable number.

3645439420 is an abundant number, since it is smaller than the sum of its proper divisors (5385853508).

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

3645439420 is a wasteful number, since it uses less digits than its factorization.

3645439420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840010 (or 840008 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 3645439420 is about 60377.4744420467. The cubic root of 3645439420 is about 1539.0401929504.

The spelling of 3645439420 in words is "three billion, six hundred forty-five million, four hundred thirty-nine thousand, four hundred twenty".