39911916 has 48 divisors (see below), whose sum is σ = 102146688. Its totient is φ = 12028800.

The previous prime is 39911899. The next prime is 39911941. The reversal of 39911916 is 61911993.

It is a happy number.

It is a super-2 number, since 2×39911916² = 3185922077582112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27136 + ... + 28568.

It is an arithmetic number, because the mean of its divisors is an integer number (2128056).

Almost surely, 2^39911916 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 39911916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51073344).

39911916 is an abundant number, since it is smaller than the sum of its proper divisors (62234772).

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

39911916 is a wasteful number, since it uses less digits than its factorization.

39911916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1660 counting only the distinct ones).

The product of its digits is 13122, while the sum is 39.

The square root of 39911916 is about 6317.5878308101. The cubic root of 39911916 is about 341.7439689721.

The spelling of 39911916 in words is "thirty-nine million, nine hundred eleven thousand, nine hundred sixteen".