1220540402 has 16 divisors (see below), whose sum is σ = 1912825152. Its totient is φ = 582999120.

The previous prime is 1220540383. The next prime is 1220540467. The reversal of 1220540402 is 2040450221.

It is a happy number.

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, 20948 + ... + 53664.

It is an arithmetic number, because the mean of its divisors is an integer number (119551572).

Almost surely, 2^1220540402 is an apocalyptic number.

1220540402 is a deficient number, since it is larger than the sum of its proper divisors (692284750).

1220540402 is a wasteful number, since it uses less digits than its factorization.

1220540402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33553.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1220540402 is about 34936.2333688107. The cubic root of 1220540402 is about 1068.6874761503.

Adding to 1220540402 its reverse (2040450221), we get a palindrome (3260990623).

The spelling of 1220540402 in words is "one billion, two hundred twenty million, five hundred forty thousand, four hundred two".