1338338440 has 32 divisors (see below), whose sum is σ = 3018098880. Its totient is φ = 534119872.

The previous prime is 1338338437. The next prime is 1338338453. The reversal of 1338338440 is 448338331.

It is a super-2 number, since 2×1338338440² = 3582299559963267200, 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 1338338440.

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, 20044 + ... + 55483.

It is an arithmetic number, because the mean of its divisors is an integer number (94315590).

Almost surely, 2^1338338440 is an apocalyptic number.

1338338440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1338338440 is an abundant number, since it is smaller than the sum of its proper divisors (1679760440).

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

1338338440 is a wasteful number, since it uses less digits than its factorization.

1338338440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75981 (or 75977 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 1338338440 is about 36583.3082156330. The cubic root of 1338338440 is about 1102.0179047885.

The spelling of 1338338440 in words is "one billion, three hundred thirty-eight million, three hundred thirty-eight thousand, four hundred forty".