3652120640 has 56 divisors (see below), whose sum is σ = 9938991552. Its totient is φ = 1252154880.

The previous prime is 3652120639. The next prime is 3652120679. The reversal of 3652120640 is 460212563.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×3652120640² = 26675970338228019200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812966 + ... + 817445.

It is an arithmetic number, because the mean of its divisors is an integer number (177481992).

Almost surely, 2^3652120640 is an apocalyptic number.

It is an amenable number.

3652120640 is an abundant number, since it is smaller than the sum of its proper divisors (6286870912).

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

3652120640 is a wasteful number, since it uses less digits than its factorization.

3652120640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630435 (or 1630425 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 3652120640 is about 60432.7778610251. Note that the first 3 decimals coincide. The cubic root of 3652120640 is about 1539.9798501889.

The spelling of 3652120640 in words is "three billion, six hundred fifty-two million, one hundred twenty thousand, six hundred forty".