39973806 has 24 divisors (see below), whose sum is σ = 86799960. Its totient is φ = 13295376.

The previous prime is 39973757. The next prime is 39973807. The reversal of 39973806 is 60837993.

It is a happy number.

It is a super-2 number, since 2×39973806² = 3195810332251272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39973807) 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, 6981 + ... + 11343.

It is an arithmetic number, because the mean of its divisors is an integer number (3616665).

Almost surely, 2^39973806 is an apocalyptic number.

39973806 is an abundant number, since it is smaller than the sum of its proper divisors (46826154).

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

39973806 is a wasteful number, since it uses less digits than its factorization.

39973806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880 (or 4877 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39973806 is about 6322.4841636812. The cubic root of 39973806 is about 341.9205211842.

The spelling of 39973806 in words is "thirty-nine million, nine hundred seventy-three thousand, eight hundred six".