1238767992 has 480 divisors, whose sum is σ = 4549812960. Its totient is φ = 307929600.

The previous prime is 1238767939. The next prime is 1238768021. The reversal of 1238767992 is 2997678321.

It is a super-2 number, since 2×1238767992² = 3069092276007424128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 20307642 + ... + 20307702.

It is an arithmetic number, because the mean of its divisors is an integer number (9478777).

Almost surely, 2^1238767992 is an apocalyptic number.

1238767992 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 1238767992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2274906480).

1238767992 is an abundant number, since it is smaller than the sum of its proper divisors (3311044968).

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

1238767992 is a wasteful number, since it uses less digits than its factorization.

1238767992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 121 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1238767992 is about 35196.1360379233. The cubic root of 1238767992 is about 1073.9811488218.

The spelling of 1238767992 in words is "one billion, two hundred thirty-eight million, seven hundred sixty-seven thousand, nine hundred ninety-two".