1222629990 has 16 divisors (see below), whose sum is σ = 2934312048. Its totient is φ = 326034656.

The previous prime is 1222629983. The next prime is 1222630027. The reversal of 1222629990 is 999262221.

It is a congruent 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, 20377137 + ... + 20377196.

It is an arithmetic number, because the mean of its divisors is an integer number (183394503).

Almost surely, 2^1222629990 is an apocalyptic number.

1222629990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222629990 is an abundant number, since it is smaller than the sum of its proper divisors (1711682058).

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

1222629990 is a wasteful number, since it uses less digits than its factorization.

1222629990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40754343.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1222629990 is about 34966.1263224853. The cubic root of 1222629990 is about 1069.2969994276.

The spelling of 1222629990 in words is "one billion, two hundred twenty-two million, six hundred twenty-nine thousand, nine hundred ninety".