39951968 has 48 divisors (see below), whose sum is σ = 91445760. Its totient is φ = 16826496.

The previous prime is 39951931. The next prime is 39951973. The reversal of 39951968 is 86915993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11705 + ... + 14727.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^39951968 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 39951968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45722880).

39951968 is an abundant number, since it is smaller than the sum of its proper divisors (51493792).

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

39951968 is a wasteful number, since it uses less digits than its factorization.

39951968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099 (or 3091 counting only the distinct ones).

The product of its digits is 524880, while the sum is 50.

The square root of 39951968 is about 6320.7569166991. The cubic root of 39951968 is about 341.8582452321.

The spelling of 39951968 in words is "thirty-nine million, nine hundred fifty-one thousand, nine hundred sixty-eight".