1223019090 has 48 divisors (see below), whose sum is σ = 3265800408. Its totient is φ = 317323008.

The previous prime is 1223019079. The next prime is 1223019103. The reversal of 1223019090 is 909103221.

It can be written as a sum of positive squares in 4 ways, for example, as 1016780769 + 206238321 = 31887^2 + 14361^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180307 + ... + 186966.

Almost surely, 2^1223019090 is an apocalyptic number.

1223019090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223019090 is an abundant number, since it is smaller than the sum of its proper divisors (2042781318).

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

1223019090 is a wasteful number, since it uses less digits than its factorization.

1223019090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367323 (or 367320 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1223019090 is about 34971.6898362089. The cubic root of 1223019090 is about 1069.4104214049.

The spelling of 1223019090 in words is "one billion, two hundred twenty-three million, nineteen thousand, ninety".