1228372864 has 32 divisors (see below), whose sum is σ = 2448734400. Its totient is φ = 613788672.

The previous prime is 1228372729. The next prime is 1228372883. The reversal of 1228372864 is 4682738221.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1228372864.

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, 364017 + ... + 367375.

It is an arithmetic number, because the mean of its divisors is an integer number (76522950).

Almost surely, 2^1228372864 is an apocalyptic number.

It is an amenable number.

1228372864 is a deficient number, since it is larger than the sum of its proper divisors (1220361536).

1228372864 is an equidigital number, since it uses as much as digits as its factorization.

1228372864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6230 (or 6218 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 1228372864 is about 35048.1506502126. The cubic root of 1228372864 is about 1070.9686003180.

The spelling of 1228372864 in words is "one billion, two hundred twenty-eight million, three hundred seventy-two thousand, eight hundred sixty-four".