1230072440 has 32 divisors (see below), whose sum is σ = 2777976000. Its totient is φ = 490195584.

The previous prime is 1230072433. The next prime is 1230072509. The reversal of 1230072440 is 442700321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46400 + ... + 67919.

It is an arithmetic number, because the mean of its divisors is an integer number (86811750).

Almost surely, 2^1230072440 is an apocalyptic number.

1230072440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230072440 is an abundant number, since it is smaller than the sum of its proper divisors (1547903560).

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

1230072440 is a wasteful number, since it uses less digits than its factorization.

1230072440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114599 (or 114595 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 1230072440 is about 35072.3885699278. The cubic root of 1230072440 is about 1071.4623032089.

Adding to 1230072440 its reverse (442700321), we get a palindrome (1672772761).

The spelling of 1230072440 in words is "one billion, two hundred thirty million, seventy-two thousand, four hundred forty".