39949514820 has 192 divisors, whose sum is σ = 131751567360. Its totient is φ = 10014879744.

The previous prime is 39949514809. The next prime is 39949514849. The reversal of 39949514820 is 2841594993.

39949514820 is a `hidden beast` number, since 3 + 9 + 9 + 49 + 514 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10068477 + ... + 10072443.

It is an arithmetic number, because the mean of its divisors is an integer number (686206080).

Almost surely, 2^39949514820 is an apocalyptic number.

39949514820 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 39949514820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65875783680).

39949514820 is an abundant number, since it is smaller than the sum of its proper divisors (91802052540).

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

39949514820 is a wasteful number, since it uses less digits than its factorization.

39949514820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099 (or 5091 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 39949514820 in words is "thirty-nine billion, nine hundred forty-nine million, five hundred fourteen thousand, eight hundred twenty".