1220242844 has 6 divisors (see below), whose sum is σ = 2135424984. Its totient is φ = 610121420.

The previous prime is 1220242787. The next prime is 1220242883. The reversal of 1220242844 is 4482420221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152530352 + ... + 152530359.

It is an arithmetic number, because the mean of its divisors is an integer number (355904164).

Almost surely, 2^1220242844 is an apocalyptic number.

It is an amenable number.

1220242844 is a deficient number, since it is larger than the sum of its proper divisors (915182140).

1220242844 is a wasteful number, since it uses less digits than its factorization.

1220242844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305060715 (or 305060713 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 29.

The square root of 1220242844 is about 34931.9745219190. The cubic root of 1220242844 is about 1068.6006232687.

The spelling of 1220242844 in words is "one billion, two hundred twenty million, two hundred forty-two thousand, eight hundred forty-four".