1220968920 has 64 divisors (see below), whose sum is σ = 3761917920. Its totient is φ = 316790784.

The previous prime is 1220968913. The next prime is 1220968921. The reversal of 1220968920 is 298690221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220968921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133057 + ... + 141936.

Almost surely, 2^1220968920 is an apocalyptic number.

1220968920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220968920 is an abundant number, since it is smaller than the sum of its proper divisors (2540949000).

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

1220968920 is a wasteful number, since it uses less digits than its factorization.

1220968920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275044 (or 275040 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1220968920 is about 34942.3656898041. The cubic root of 1220968920 is about 1068.8125295654.

The spelling of 1220968920 in words is "one billion, two hundred twenty million, nine hundred sixty-eight thousand, nine hundred twenty".