1220299990 has 96 divisors (see below), whose sum is σ = 2812812480. Its totient is φ = 372782592.

The previous prime is 1220299981. The next prime is 1220299991. The reversal of 1220299990 is 999920221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220299991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 341292 + ... + 344848.

It is an arithmetic number, because the mean of its divisors is an integer number (29300130).

Almost surely, 2^1220299990 is an apocalyptic number.

1220299990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220299990 is an abundant number, since it is smaller than the sum of its proper divisors (1592512490).

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

1220299990 is a wasteful number, since it uses less digits than its factorization.

1220299990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626 (or 3613 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 1220299990 is about 34932.7924735484. The cubic root of 1220299990 is about 1068.6173044559.

The spelling of 1220299990 in words is "one billion, two hundred twenty million, two hundred ninety-nine thousand, nine hundred ninety".