3656540940 has 48 divisors (see below), whose sum is σ = 11025879648. Its totient is φ = 900071424.

The previous prime is 3656540939. The next prime is 3656540957. The reversal of 3656540940 is 490456563.

3656540940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3656540892 and 3656540901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2343157 + ... + 2344716.

It is an arithmetic number, because the mean of its divisors is an integer number (229705826).

Almost surely, 2^3656540940 is an apocalyptic number.

3656540940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3656540940 is an abundant number, since it is smaller than the sum of its proper divisors (7369338708).

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

3656540940 is a wasteful number, since it uses less digits than its factorization.

3656540940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687898 (or 4687896 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 3656540940 is about 60469.3388420942. The cubic root of 3656540940 is about 1540.6008983526.

The spelling of 3656540940 in words is "three billion, six hundred fifty-six million, five hundred forty thousand, nine hundred forty".