1338955992 has 144 divisors (see below), whose sum is σ = 4196283000. Its totient is φ = 384341760.

The previous prime is 1338955991. The next prime is 1338955997. The reversal of 1338955992 is 2995598331.

1338955992 is a `hidden beast` number, since 1 + 3 + 3 + 89 + 559 + 9 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338955991) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 161484 + ... + 169572.

Almost surely, 2^1338955992 is an apocalyptic number.

1338955992 is a gapful number since it is divisible by the number (12) 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 1338955992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2098141500).

1338955992 is an abundant number, since it is smaller than the sum of its proper divisors (2857327008).

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

1338955992 is a wasteful number, since it uses less digits than its factorization.

1338955992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142 (or 8124 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 1338955992 is about 36591.7475942322. The cubic root of 1338955992 is about 1102.1873807823.

The spelling of 1338955992 in words is "one billion, three hundred thirty-eight million, nine hundred fifty-five thousand, nine hundred ninety-two".