3921431402 has 32 divisors (see below), whose sum is σ = 6775902720. Its totient is φ = 1667297520.

The previous prime is 3921431387. The next prime is 3921431407. The reversal of 3921431402 is 2041341293.

It is not an unprimeable number, because it can be changed into a prime (3921431407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228853 + ... + 1232039.

It is an arithmetic number, because the mean of its divisors is an integer number (211746960).

Almost surely, 2^3921431402 is an apocalyptic number.

3921431402 is a deficient number, since it is larger than the sum of its proper divisors (2854471318).

3921431402 is a wasteful number, since it uses less digits than its factorization.

3921431402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3866.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 3921431402 is about 62621.3334415677. Note that the first 3 decimals coincide. The cubic root of 3921431402 is about 1576.9389275360.

Adding to 3921431402 its reverse (2041341293), we get a palindrome (5962772695).

The spelling of 3921431402 in words is "three billion, nine hundred twenty-one million, four hundred thirty-one thousand, four hundred two".