39994738560 has 1536 divisors, whose sum is σ = 182847974400. Its totient is φ = 7835222016.

The previous prime is 39994738549. The next prime is 39994738583. The reversal of 39994738560 is 6583749993.

39994738560 is a `hidden beast` number, since 39 + 9 + 9 + 4 + 7 + 38 + 560 = 666.

It is a super-2 number, since 2×39994738560² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 481864279 + ... + 481864361.

It is an arithmetic number, because the mean of its divisors is an integer number (119041650).

Almost surely, 2^39994738560 is an apocalyptic number.

39994738560 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 39994738560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91423987200).

39994738560 is an abundant number, since it is smaller than the sum of its proper divisors (142853235840).

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

39994738560 is a wasteful number, since it uses less digits than its factorization.

39994738560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 63.

The spelling of 39994738560 in words is "thirty-nine billion, nine hundred ninety-four million, seven hundred thirty-eight thousand, five hundred sixty".