3940394061 has 8 divisors (see below), whose sum is σ = 5254207840. Its totient is φ = 2626754832.

The previous prime is 3940394057. The next prime is 3940394083. The reversal of 3940394061 is 1604930493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3940394061 - 2² = 3940394057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940392061) 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, 24030 + ... + 91968.

It is an arithmetic number, because the mean of its divisors is an integer number (656775980).

Almost surely, 2^3940394061 is an apocalyptic number.

It is an amenable number.

3940394061 is a deficient number, since it is larger than the sum of its proper divisors (1313813779).

3940394061 is a wasteful number, since it uses less digits than its factorization.

3940394061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87275.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 3940394061 is about 62772.5581842894. The cubic root of 3940394061 is about 1579.4766814928.

The spelling of 3940394061 in words is "three billion, nine hundred forty million, three hundred ninety-four thousand, sixty-one".