39664546 has 8 divisors (see below), whose sum is σ = 59524380. Its totient is φ = 19823088.

The previous prime is 39664543. The next prime is 39664549. The reversal of 39664546 is 64546693.

It is an interprime number because it is at equal distance from previous prime (39664543) and next prime (39664549).

It can be written as a sum of positive squares in 2 ways, for example, as 36905625 + 2758921 = 6075^2 + 1661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×39664546² = 3146552418772232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39664543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4080 + ... + 9796.

Almost surely, 2^39664546 is an apocalyptic number.

39664546 is a deficient number, since it is larger than the sum of its proper divisors (19859834).

39664546 is a wasteful number, since it uses less digits than its factorization.

39664546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9188.

The product of its digits is 466560, while the sum is 43.

The square root of 39664546 is about 6297.9795172738. The cubic root of 39664546 is about 341.0364738264.

The spelling of 39664546 in words is "thirty-nine million, six hundred sixty-four thousand, five hundred forty-six".