1230552640 has 28 divisors (see below), whose sum is σ = 2930254236. Its totient is φ = 492220928.

The previous prime is 1230552611. The next prime is 1230552703. The reversal of 1230552640 is 462550321.

It can be written as a sum of positive squares in 2 ways, for example, as 760877056 + 469675584 = 27584^2 + 21672^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1230552599 and 1230552608.

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 3 ways as a sum of consecutive naturals, for example, 1922419 + ... + 1923058.

It is an arithmetic number, because the mean of its divisors is an integer number (104651937).

Almost surely, 2^1230552640 is an apocalyptic number.

1230552640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230552640 is an abundant number, since it is smaller than the sum of its proper divisors (1699701596).

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

1230552640 is an equidigital number, since it uses as much as digits as its factorization.

1230552640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845494 (or 3845484 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1230552640 is about 35079.2337430566. The cubic root of 1230552640 is about 1071.6017121421.

The spelling of 1230552640 in words is "one billion, two hundred thirty million, five hundred fifty-two thousand, six hundred forty".