1223752780 has 24 divisors (see below), whose sum is σ = 2571171120. Its totient is φ = 489255360.

The previous prime is 1223752757. The next prime is 1223752793. The reversal of 1223752780 is 872573221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28531 + ... + 57109.

It is an arithmetic number, because the mean of its divisors is an integer number (107132130).

Almost surely, 2^1223752780 is an apocalyptic number.

1223752780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223752780 is an abundant number, since it is smaller than the sum of its proper divisors (1347418340).

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

1223752780 is a wasteful number, since it uses less digits than its factorization.

1223752780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30729 (or 30727 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1223752780 is about 34982.1780339647. The cubic root of 1223752780 is about 1069.6242253413.

The spelling of 1223752780 in words is "one billion, two hundred twenty-three million, seven hundred fifty-two thousand, seven hundred eighty".