1220009990 has 16 divisors (see below), whose sum is σ = 2271743280. Its totient is φ = 471176160.

The previous prime is 1220009977. The next prime is 1220009993. The reversal of 1220009990 is 999000221.

1220009990 is a modest number, since divided by 9990 gives 1220 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220009993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2103176 + ... + 2103755.

It is an arithmetic number, because the mean of its divisors is an integer number (141983955).

Almost surely, 2^1220009990 is an apocalyptic number.

1220009990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220009990 is a deficient number, since it is larger than the sum of its proper divisors (1051733290).

1220009990 is a wasteful number, since it uses less digits than its factorization.

1220009990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206967.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 1220009990 is about 34928.6413992872. The cubic root of 1220009990 is about 1068.5326467016.

The spelling of 1220009990 in words is "one billion, two hundred twenty million, nine thousand, nine hundred ninety".