1229338540 has 24 divisors (see below), whose sum is σ = 2589022800. Its totient is φ = 490323648.

The previous prime is 1229338531. The next prime is 1229338541. The reversal of 1229338540 is 458339221.

It is a super-2 number, since 2×1229338540² = 3022546491858663200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1229338540.

It is not an unprimeable number, because it can be changed into a prime (1229338541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81082 + ... + 95041.

It is an arithmetic number, because the mean of its divisors is an integer number (107875950).

Almost surely, 2^1229338540 is an apocalyptic number.

1229338540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229338540 is an abundant number, since it is smaller than the sum of its proper divisors (1359684260).

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

1229338540 is a wasteful number, since it uses less digits than its factorization.

1229338540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176481 (or 176479 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1229338540 is about 35061.9243624762. The cubic root of 1229338540 is about 1071.2491714190.

The spelling of 1229338540 in words is "one billion, two hundred twenty-nine million, three hundred thirty-eight thousand, five hundred forty".