3205720412 has 12 divisors (see below), whose sum is σ = 5610496080. Its totient is φ = 1602721536.

The previous prime is 3205720409. The next prime is 3205720421. The reversal of 3205720412 is 2140275023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31289 + ... + 85967.

It is an arithmetic number, because the mean of its divisors is an integer number (467541340).

Almost surely, 2^3205720412 is an apocalyptic number.

It is an amenable number.

3205720412 is a deficient number, since it is larger than the sum of its proper divisors (2404775668).

3205720412 is a wasteful number, since it uses less digits than its factorization.

3205720412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69340 (or 69338 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 3205720412 is about 56619.0816951317. The cubic root of 3205720412 is about 1474.4901674915.

Adding to 3205720412 its reverse (2140275023), we get a palindrome (5345995435).

The spelling of 3205720412 in words is "three billion, two hundred five million, seven hundred twenty thousand, four hundred twelve".