1228520686 has 8 divisors (see below), whose sum is σ = 1881989280. Its totient is φ = 601190928.

The previous prime is 1228520681. The next prime is 1228520687. The reversal of 1228520686 is 6860258221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228520681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6534591 + ... + 6534778.

It is an arithmetic number, because the mean of its divisors is an integer number (235248660).

Almost surely, 2^1228520686 is an apocalyptic number.

1228520686 is a deficient number, since it is larger than the sum of its proper divisors (653468594).

1228520686 is a wasteful number, since it uses less digits than its factorization.

1228520686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13069418.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 1228520686 is about 35050.2594284265. The cubic root of 1228520686 is about 1071.0115586019.

The spelling of 1228520686 in words is "one billion, two hundred twenty-eight million, five hundred twenty thousand, six hundred eighty-six".