1220776264 has 8 divisors (see below), whose sum is σ = 2288955510. Its totient is φ = 610388128.

The previous prime is 1220776253. The next prime is 1220776279. The reversal of 1220776264 is 4626770221.

It can be written as a sum of positive squares in only one way, i.e., 815559364 + 405216900 = 28558^2 + 20130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76298509 + ... + 76298524.

Almost surely, 2^1220776264 is an apocalyptic number.

It is an amenable number.

1220776264 is a deficient number, since it is larger than the sum of its proper divisors (1068179246).

1220776264 is a wasteful number, since it uses less digits than its factorization.

1220776264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152597039 (or 152597035 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 1220776264 is about 34939.6088129218. The cubic root of 1220776264 is about 1068.7563108322.

The spelling of 1220776264 in words is "one billion, two hundred twenty million, seven hundred seventy-six thousand, two hundred sixty-four".