1220804936 has 32 divisors (see below), whose sum is σ = 2531718840. Its totient is φ = 548218368.

The previous prime is 1220804927. The next prime is 1220804941. The reversal of 1220804936 is 6394080221.

It can be written as a sum of positive squares in 4 ways, for example, as 960628036 + 260176900 = 30994^2 + 16130^2 .

It is a super-3 number, since 3×1220804936³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220804896 and 1220804905.

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, 154781 + ... + 162476.

Almost surely, 2^1220804936 is an apocalyptic number.

It is an amenable number.

1220804936 is an abundant number, since it is smaller than the sum of its proper divisors (1310913904).

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

1220804936 is a wasteful number, since it uses less digits than its factorization.

1220804936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317313 (or 317309 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1220804936 is about 34940.0191184836. The cubic root of 1220804936 is about 1068.7646779512.

The spelling of 1220804936 in words is "one billion, two hundred twenty million, eight hundred four thousand, nine hundred thirty-six".