1229866990 has 24 divisors (see below), whose sum is σ = 2433309480. Its totient is φ = 447223920.

The previous prime is 1229866987. The next prime is 1229866997. The reversal of 1229866990 is 996689221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229866997) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 507000 + ... + 509419.

It is an arithmetic number, because the mean of its divisors is an integer number (101387895).

Almost surely, 2^1229866990 is an apocalyptic number.

1229866990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1229866990 is a deficient number, since it is larger than the sum of its proper divisors (1203442490).

1229866990 is a wasteful number, since it uses less digits than its factorization.

1229866990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016448 (or 1016437 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 1229866990 is about 35069.4595053873. The cubic root of 1229866990 is about 1071.4026470510.

The spelling of 1229866990 in words is "one billion, two hundred twenty-nine million, eight hundred sixty-six thousand, nine hundred ninety".