1230275640 has 128 divisors (see below), whose sum is σ = 4051192320. Its totient is φ = 296409600.

The previous prime is 1230275617. The next prime is 1230275653. The reversal of 1230275640 is 465720321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1230275598 and 1230275607.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 217650 + ... + 223230.

It is an arithmetic number, because the mean of its divisors is an integer number (31649940).

Almost surely, 2^1230275640 is an apocalyptic number.

1230275640 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 1230275640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025596160).

1230275640 is an abundant number, since it is smaller than the sum of its proper divisors (2820916680).

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

1230275640 is a wasteful number, since it uses less digits than its factorization.

1230275640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5773 (or 5769 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1230275640 is about 35075.2853160170. The cubic root of 1230275640 is about 1071.5212995047.

Adding to 1230275640 its reverse (465720321), we get a palindrome (1695995961).

The spelling of 1230275640 in words is "one billion, two hundred thirty million, two hundred seventy-five thousand, six hundred forty".