3645020140 has 24 divisors (see below), whose sum is σ = 7817406912. Its totient is φ = 1426986240.

The previous prime is 3645020131. The next prime is 3645020191. The reversal of 3645020140 is 410205463.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937901 + ... + 1939780.

It is an arithmetic number, because the mean of its divisors is an integer number (325725288).

Almost surely, 2^3645020140 is an apocalyptic number.

It is an amenable number.

3645020140 is an abundant number, since it is smaller than the sum of its proper divisors (4172386772).

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

3645020140 is a wasteful number, since it uses less digits than its factorization.

3645020140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877737 (or 3877735 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 3645020140 is about 60374.0021863716. The cubic root of 3645020140 is about 1538.9811864825.

The spelling of 3645020140 in words is "three billion, six hundred forty-five million, twenty thousand, one hundred forty".