1220964686 has 8 divisors (see below), whose sum is σ = 1833041664. Its totient is φ = 609950800.

The previous prime is 1220964653. The next prime is 1220964691. The reversal of 1220964686 is 6864690221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262895 + ... + 267498.

It is an arithmetic number, because the mean of its divisors is an integer number (229130208).

Almost surely, 2^1220964686 is an apocalyptic number.

1220964686 is a deficient number, since it is larger than the sum of its proper divisors (612076978).

1220964686 is a wasteful number, since it uses less digits than its factorization.

1220964686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531546.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1220964686 is about 34942.3051042715. The cubic root of 1220964686 is about 1068.8112941101.

The spelling of 1220964686 in words is "one billion, two hundred twenty million, nine hundred sixty-four thousand, six hundred eighty-six".