39690566 has 16 divisors (see below), whose sum is σ = 61412256. Its totient is φ = 19224576.

The previous prime is 39690533. The next prime is 39690569. The reversal of 39690566 is 66509693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39690569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17975 + ... + 20061.

It is an arithmetic number, because the mean of its divisors is an integer number (3838266).

Almost surely, 2^39690566 is an apocalyptic number.

39690566 is a deficient number, since it is larger than the sum of its proper divisors (21721690).

39690566 is a wasteful number, since it uses less digits than its factorization.

39690566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 39690566 is about 6300.0449204748. The cubic root of 39690566 is about 341.1110310002. Note that the first 3 decimals are identical.

The spelling of 39690566 in words is "thirty-nine million, six hundred ninety thousand, five hundred sixty-six".