39891996 has 36 divisors (see below), whose sum is σ = 106771392. Its totient is φ = 12514944.

The previous prime is 39891991. The next prime is 39892033. The reversal of 39891996 is 69919893.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39891991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31980 + ... + 33203.

It is an arithmetic number, because the mean of its divisors is an integer number (2965872).

Almost surely, 2^39891996 is an apocalyptic number.

39891996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

39891996 is an abundant number, since it is smaller than the sum of its proper divisors (66879396).

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

39891996 is a wasteful number, since it uses less digits than its factorization.

39891996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65210 (or 65205 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 39891996 is about 6316.0110829542. The cubic root of 39891996 is about 341.6871048122.

The spelling of 39891996 in words is "thirty-nine million, eight hundred ninety-one thousand, nine hundred ninety-six".