1230781320 has 96 divisors (see below), whose sum is σ = 4108192920. Its totient is φ = 319334400.

The previous prime is 1230781309. The next prime is 1230781333. The reversal of 1230781320 is 231870321.

It can be written as a sum of positive squares in 4 ways, for example, as 1230746724 + 34596 = 35082^2 + 186^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32881 + ... + 59520.

Almost surely, 2^1230781320 is an apocalyptic number.

1230781320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230781320 is an abundant number, since it is smaller than the sum of its proper divisors (2877411600).

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

1230781320 is a wasteful number, since it uses less digits than its factorization.

1230781320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92455 (or 92448 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1230781320 is about 35082.4930699060. The cubic root of 1230781320 is about 1071.6680884712.

The spelling of 1230781320 in words is "one billion, two hundred thirty million, seven hundred eighty-one thousand, three hundred twenty".