3993481440 has 288 divisors, whose sum is σ = 15221527776. Its totient is φ = 982886400.

The previous prime is 3993481357. The next prime is 3993481451. The reversal of 3993481440 is 441843993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 501490 + ... + 509390.

It is an arithmetic number, because the mean of its divisors is an integer number (52852527).

Almost surely, 2^3993481440 is an apocalyptic number.

3993481440 is a gapful number since it is divisible by the number (30) 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 3993481440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7610763888).

3993481440 is an abundant number, since it is smaller than the sum of its proper divisors (11228046336).

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

3993481440 is a wasteful number, since it uses less digits than its factorization.

3993481440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7944 (or 7924 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 3993481440 is about 63193.9984492198. The cubic root of 3993481440 is about 1586.5382857154.

The spelling of 3993481440 in words is "three billion, nine hundred ninety-three million, four hundred eighty-one thousand, four hundred forty".