1230785280 has 252 divisors, whose sum is σ = 4423502160. Its totient is φ = 327960576.

The previous prime is 1230785267. The next prime is 1230785291. The reversal of 1230785280 is 825870321.

1230785280 is a `hidden beast` number, since 123 + 0 + 7 + 8 + 528 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 932461 + ... + 933779.

It is an arithmetic number, because the mean of its divisors is an integer number (17553580).

Almost surely, 2^1230785280 is an apocalyptic number.

1230785280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230785280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211751080).

1230785280 is an abundant number, since it is smaller than the sum of its proper divisors (3192716880).

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

1230785280 is an frugal number, since it uses more digits than its factorization.

1230785280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1230785280 is about 35082.5495082669. The cubic root of 1230785280 is about 1071.6692378227.

The spelling of 1230785280 in words is "one billion, two hundred thirty million, seven hundred eighty-five thousand, two hundred eighty".