3540631640 has 64 divisors (see below), whose sum is σ = 9804836160. Its totient is φ = 1120550400.

The previous prime is 3540631637. The next prime is 3540631649. The reversal of 3540631640 is 461360453.

It is a junction number, because it is equal to n+sod(n) for n = 3540631597 and 3540631606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3540631649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482711 + ... + 489990.

It is an arithmetic number, because the mean of its divisors is an integer number (153200565).

Almost surely, 2^3540631640 is an apocalyptic number.

It is an amenable number.

3540631640 is an abundant number, since it is smaller than the sum of its proper divisors (6264204520).

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

3540631640 is a wasteful number, since it uses less digits than its factorization.

3540631640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972732 (or 972728 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 3540631640 is about 59503.2069723977. The cubic root of 3540631640 is about 1524.1472096670.

The spelling of 3540631640 in words is "three billion, five hundred forty million, six hundred thirty-one thousand, six hundred forty".