1220393256 has 32 divisors (see below), whose sum is σ = 3211562400. Its totient is φ = 385387200.

The previous prime is 1220393203. The next prime is 1220393269. The reversal of 1220393256 is 6523930221.

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, 1337695 + ... + 1338606.

It is an arithmetic number, because the mean of its divisors is an integer number (100361325).

Almost surely, 2^1220393256 is an apocalyptic number.

It is an amenable number.

1220393256 is an abundant number, since it is smaller than the sum of its proper divisors (1991169144).

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

1220393256 is a wasteful number, since it uses less digits than its factorization.

1220393256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676329 (or 2676325 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 1220393256 is about 34934.1273828330. The cubic root of 1220393256 is about 1068.6445281231.

The spelling of 1220393256 in words is "one billion, two hundred twenty million, three hundred ninety-three thousand, two hundred fifty-six".