1238040000 has 420 divisors, whose sum is σ = 4693528840. Its totient is φ = 311040000.

The previous prime is 1238039989. The next prime is 1238040043. The reversal of 1238040000 is 408321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6839910 + ... + 6840090.

Almost surely, 2^1238040000 is an apocalyptic number.

1238040000 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 1238040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346764420).

1238040000 is an abundant number, since it is smaller than the sum of its proper divisors (3455488840).

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

1238040000 is a wasteful number, since it uses less digits than its factorization.

1238040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1238040000 is about 35185.7925873498. The cubic root of 1238040000 is about 1073.7707239219.

Adding to 1238040000 its reverse (408321), we get a palindrome (1238448321).

The spelling of 1238040000 in words is "one billion, two hundred thirty-eight million, forty thousand".