39406637952 has 192 divisors, whose sum is σ = 124865919360. Its totient is φ = 11829396480.

The previous prime is 39406637947. The next prime is 39406637969. The reversal of 39406637952 is 25973660493.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×39406637952² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1341373 + ... + 1370435.

It is an arithmetic number, because the mean of its divisors is an integer number (650343330).

Almost surely, 2^39406637952 is an apocalyptic number.

39406637952 is a gapful number since it is divisible by the number (32) 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 39406637952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62432959680).

39406637952 is an abundant number, since it is smaller than the sum of its proper divisors (85459281408).

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

39406637952 is a wasteful number, since it uses less digits than its factorization.

39406637952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29201 (or 29186 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 54.

The spelling of 39406637952 in words is "thirty-nine billion, four hundred six million, six hundred thirty-seven thousand, nine hundred fifty-two".