1220162836 has 6 divisors (see below), whose sum is σ = 2135284970. Its totient is φ = 610081416.

The previous prime is 1220162819. The next prime is 1220162851. The reversal of 1220162836 is 6382610221.

It can be written as a sum of positive squares in only one way, i.e., 672883600 + 547279236 = 25940^2 + 23394^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220162798 and 1220162807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152520351 + ... + 152520358.

Almost surely, 2^1220162836 is an apocalyptic number.

It is an amenable number.

1220162836 is a deficient number, since it is larger than the sum of its proper divisors (915122134).

1220162836 is a wasteful number, since it uses less digits than its factorization.

1220162836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305040713 (or 305040711 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1220162836 is about 34930.8293059297. The cubic root of 1220162836 is about 1068.5772676807.

The spelling of 1220162836 in words is "one billion, two hundred twenty million, one hundred sixty-two thousand, eight hundred thirty-six".