1230528240 has 320 divisors, whose sum is σ = 4427395200. Its totient is φ = 313860096.

The previous prime is 1230528209. The next prime is 1230528259. The reversal of 1230528240 is 428250321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7112794 + ... + 7112966.

It is an arithmetic number, because the mean of its divisors is an integer number (13835610).

Almost surely, 2^1230528240 is an apocalyptic number.

1230528240 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 1230528240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2213697600).

1230528240 is an abundant number, since it is smaller than the sum of its proper divisors (3196866960).

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

1230528240 is a wasteful number, since it uses less digits than its factorization.

1230528240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1230528240 is about 35078.8859572250. The cubic root of 1230528240 is about 1071.5946293475.

Adding to 1230528240 its reverse (428250321), we get a palindrome (1658778561).

The spelling of 1230528240 in words is "one billion, two hundred thirty million, five hundred twenty-eight thousand, two hundred forty".