3981001940 has 24 divisors (see below), whose sum is σ = 8363299560. Its totient is φ = 1591792128.

The previous prime is 3981001933. The next prime is 3981001987. The reversal of 3981001940 is 491001893.

It can be written as a sum of positive squares in 4 ways, for example, as 309126724 + 3671875216 = 17582^2 + 60596^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3981001940.

It is a congruent number.

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, 17576 + ... + 90944.

It is an arithmetic number, because the mean of its divisors is an integer number (348470815).

Almost surely, 2^3981001940 is an apocalyptic number.

It is an amenable number.

3981001940 is an abundant number, since it is smaller than the sum of its proper divisors (4382297620).

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

3981001940 is a wasteful number, since it uses less digits than its factorization.

3981001940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76091 (or 76089 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 3981001940 is about 63095.1815909900. The cubic root of 3981001940 is about 1584.8839343538.

The spelling of 3981001940 in words is "three billion, nine hundred eighty-one million, one thousand, nine hundred forty".