4040650640 has 40 divisors (see below), whose sum is σ = 10117170168. Its totient is φ = 1491932160.

The previous prime is 4040650619. The next prime is 4040650643. The reversal of 4040650640 is 460560404.

It can be written as a sum of positive squares in 4 ways, for example, as 959512576 + 3081138064 = 30976^2 + 55508^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (4040650643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941581 + ... + 1943660.

Almost surely, 2^4040650640 is an apocalyptic number.

4040650640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4040650640 is an abundant number, since it is smaller than the sum of its proper divisors (6076519528).

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

4040650640 is a wasteful number, since it uses less digits than its factorization.

4040650640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885267 (or 3885261 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 4040650640 is about 63566.1123555625. The cubic root of 4040650640 is about 1592.7603436003.

The spelling of 4040650640 in words is "four billion, forty million, six hundred fifty thousand, six hundred forty".