3921694392 has 256 divisors, whose sum is σ = 13084876800. Its totient is φ = 948672000.

The previous prime is 3921694391. The next prime is 3921694397. The reversal of 3921694392 is 2934961293.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921694391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2140917 + ... + 2142747.

It is an arithmetic number, because the mean of its divisors is an integer number (51112800).

Almost surely, 2^3921694392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921694392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6542438400).

3921694392 is an abundant number, since it is smaller than the sum of its proper divisors (9163182408).

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

3921694392 is a wasteful number, since it uses less digits than its factorization.

3921694392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938 (or 1934 counting only the distinct ones).

The product of its digits is 629856, while the sum is 48.

The square root of 3921694392 is about 62623.4332498626. The cubic root of 3921694392 is about 1576.9741791108.

The spelling of 3921694392 in words is "three billion, nine hundred twenty-one million, six hundred ninety-four thousand, three hundred ninety-two".