3916402640 has 40 divisors (see below), whose sum is σ = 9351741480. Its totient is φ = 1524220416.

The previous prime is 3916402627. The next prime is 3916402649. The reversal of 3916402640 is 462046193.

It can be written as a sum of positive squares in 4 ways, for example, as 806332816 + 3110069824 = 28396^2 + 55768^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3916402640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3916402649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658595 + ... + 664514.

It is an arithmetic number, because the mean of its divisors is an integer number (233793537).

Almost surely, 2^3916402640 is an apocalyptic number.

It is an amenable number.

3916402640 is an abundant number, since it is smaller than the sum of its proper divisors (5435338840).

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

3916402640 is a wasteful number, since it uses less digits than its factorization.

3916402640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323159 (or 1323153 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 3916402640 is about 62581.1684135092. The cubic root of 3916402640 is about 1576.2645613045.

The spelling of 3916402640 in words is "three billion, nine hundred sixteen million, four hundred two thousand, six hundred forty".