1238997760 has 288 divisors, whose sum is σ = 3988841472. Its totient is φ = 356106240.

The previous prime is 1238997751. The next prime is 1238997763. The reversal of 1238997760 is 677998321.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 1238997698 and 1238997707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238997763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1280797 + ... + 1281763.

It is an arithmetic number, because the mean of its divisors is an integer number (13850144).

Almost surely, 2^1238997760 is an apocalyptic number.

1238997760 is a gapful number since it is divisible by the number (10) 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 1238997760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1994420736).

1238997760 is an abundant number, since it is smaller than the sum of its proper divisors (2749843712).

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

1238997760 is a wasteful number, since it uses less digits than its factorization.

1238997760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 1238997760 is about 35199.3999948863. The cubic root of 1238997760 is about 1074.0475457707.

The spelling of 1238997760 in words is "one billion, two hundred thirty-eight million, nine hundred ninety-seven thousand, seven hundred sixty".