3220400512 has 32 divisors (see below), whose sum is σ = 7332163920. Its totient is φ = 1380171264.

The previous prime is 3220400489. The next prime is 3220400527. The reversal of 3220400512 is 2150040223.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 3220400512.

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, 1796203 + ... + 1797994.

Almost surely, 2^3220400512 is an apocalyptic number.

3220400512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3220400512 is an abundant number, since it is smaller than the sum of its proper divisors (4111763408).

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

3220400512 is an equidigital number, since it uses as much as digits as its factorization.

3220400512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594218 (or 3594206 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 3220400512 is about 56748.5727750047. The cubic root of 3220400512 is about 1476.7374736761.

Adding to 3220400512 its reverse (2150040223), we get a palindrome (5370440735).

The spelling of 3220400512 in words is "three billion, two hundred twenty million, four hundred thousand, five hundred twelve".