39866804 has 6 divisors (see below), whose sum is σ = 69766914. Its totient is φ = 19933400.

The previous prime is 39866803. The next prime is 39866861. The reversal of 39866804 is 40866893.

It can be written as a sum of positive squares in only one way, i.e., 33616804 + 6250000 = 5798^2 + 2500^2 .

It is a super-3 number, since 3×39866804³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39866803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4983347 + ... + 4983354.

It is an arithmetic number, because the mean of its divisors is an integer number (11627819).

Almost surely, 2^39866804 is an apocalyptic number.

It is an amenable number.

39866804 is a deficient number, since it is larger than the sum of its proper divisors (29900110).

39866804 is a wasteful number, since it uses less digits than its factorization.

39866804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9966705 (or 9966703 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 39866804 is about 6314.0164713121. The cubic root of 39866804 is about 341.6151639468.

The spelling of 39866804 in words is "thirty-nine million, eight hundred sixty-six thousand, eight hundred four".