1220400002 has 16 divisors (see below), whose sum is σ = 1892927232. Its totient is φ = 589492560.

The previous prime is 1220399993. The next prime is 1220400019. The reversal of 1220400002 is 2000040221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19628 + ... + 53160.

It is an arithmetic number, because the mean of its divisors is an integer number (118307952).

Almost surely, 2^1220400002 is an apocalyptic number.

1220400002 is a deficient number, since it is larger than the sum of its proper divisors (672527230).

1220400002 is a wasteful number, since it uses less digits than its factorization.

1220400002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34153.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220400002 is about 34934.2239358484. The cubic root of 1220400002 is about 1068.6464971777.

Adding to 1220400002 its reverse (2000040221), we get a palindrome (3220440223).

The spelling of 1220400002 in words is "one billion, two hundred twenty million, four hundred thousand, two".