39899734437888 has 624 divisors, whose sum is σ = 132194644146656. Its totient is φ = 11944891514880.

The previous prime is 39899734437887. The next prime is 39899734437907. The reversal of 39899734437888 is 88873443799893.

It is a happy number.

39899734437888 is a `hidden beast` number, since 3 + 9 + 8 + 9 + 97 + 3 + 4 + 437 + 8 + 88 = 666.

It is a tau number, because it is divible by the number of its divisors (624).

It is a junction number, because it is equal to n+sod(n) for n = 39899734437798 and 39899734437807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39899734437887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478711098 + ... + 478794438.

Almost surely, 2^{39899734437888} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39899734437888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66097322073328).

39899734437888 is an abundant number, since it is smaller than the sum of its proper divisors (92294909708768).

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

39899734437888 is an equidigital number, since it uses as much as digits as its factorization.

39899734437888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83430 (or 83396 counting only the distinct ones).

The product of its digits is 63207309312, while the sum is 90.

The spelling of 39899734437888 in words is "thirty-nine trillion, eight hundred ninety-nine billion, seven hundred thirty-four million, four hundred thirty-seven thousand, eight hundred eighty-eight".