39886469840 has 160 divisors (see below), whose sum is σ = 108131412480. Its totient is φ = 13401096192.

The previous prime is 39886469809. The next prime is 39886469851. The reversal of 39886469840 is 4896468893.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5591396 + ... + 5598524.

It is an arithmetic number, because the mean of its divisors is an integer number (675821328).

Almost surely, 2^39886469840 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 39886469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54065706240).

39886469840 is an abundant number, since it is smaller than the sum of its proper divisors (68244942640).

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

39886469840 is a wasteful number, since it uses less digits than its factorization.

39886469840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7349 (or 7343 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 65.

The spelling of 39886469840 in words is "thirty-nine billion, eight hundred eighty-six million, four hundred sixty-nine thousand, eight hundred forty".