1223628880 has 40 divisors (see below), whose sum is σ = 2994674400. Its totient is φ = 463690368.

The previous prime is 1223628821. The next prime is 1223628893. The reversal of 1223628880 is 888263221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

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 in 7 ways as a sum of consecutive naturals, for example, 400990 + ... + 404029.

It is an arithmetic number, because the mean of its divisors is an integer number (74866860).

Almost surely, 2^1223628880 is an apocalyptic number.

1223628880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223628880 is an abundant number, since it is smaller than the sum of its proper divisors (1771045520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223628880 is a wasteful number, since it uses less digits than its factorization.

1223628880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805051 (or 805045 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 1223628880 is about 34980.4070873968. The cubic root of 1223628880 is about 1069.5881257531.

The spelling of 1223628880 in words is "one billion, two hundred twenty-three million, six hundred twenty-eight thousand, eight hundred eighty".