1220936290 has 16 divisors (see below), whose sum is σ = 2511640512. Its totient is φ = 418606704.

The previous prime is 1220936263. The next prime is 1220936291. The reversal of 1220936290 is 926390221.

It is not an unprimeable number, because it can be changed into a prime (1220936291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8720904 + ... + 8721043.

It is an arithmetic number, because the mean of its divisors is an integer number (156977532).

Almost surely, 2^1220936290 is an apocalyptic number.

1220936290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220936290 is an abundant number, since it is smaller than the sum of its proper divisors (1290704222).

1220936290 is a wasteful number, since it uses less digits than its factorization.

1220936290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17441961.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 1220936290 is about 34941.8987749664. The cubic root of 1220936290 is about 1068.8030082574.

The spelling of 1220936290 in words is "one billion, two hundred twenty million, nine hundred thirty-six thousand, two hundred ninety".