3923213540 has 12 divisors (see below), whose sum is σ = 8238748476. Its totient is φ = 1569285408.

The previous prime is 3923213513. The next prime is 3923213543. The reversal of 3923213540 is 453123293.

It can be written as a sum of positive squares in 2 ways, for example, as 762974884 + 3160238656 = 27622^2 + 56216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3923213497 and 3923213506.

It is not an unprimeable number, because it can be changed into a prime (3923213543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98080319 + ... + 98080358.

It is an arithmetic number, because the mean of its divisors is an integer number (686562373).

Almost surely, 2^3923213540 is an apocalyptic number.

It is an amenable number.

3923213540 is an abundant number, since it is smaller than the sum of its proper divisors (4315534936).

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

3923213540 is a wasteful number, since it uses less digits than its factorization.

3923213540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196160686 (or 196160684 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 3923213540 is about 62635.5613050606. The cubic root of 3923213540 is about 1577.1777771531.

The spelling of 3923213540 in words is "three billion, nine hundred twenty-three million, two hundred thirteen thousand, five hundred forty".