39166690 has 16 divisors (see below), whose sum is σ = 71467128. Its totient is φ = 15451776.

The previous prime is 39166667. The next prime is 39166703. The reversal of 39166690 is 9666193.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23030401 + 16136289 = 4799^2 + 4017^2 .

It is a super-2 number, since 2×39166690² = 3068059211112200, which contains 22 as substring.

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26097 + ... + 27556.

Almost surely, 2^39166690 is an apocalyptic number.

39166690 is a deficient number, since it is larger than the sum of its proper divisors (32300438).

39166690 is a wasteful number, since it uses less digits than its factorization.

39166690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53733.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 39166690 is about 6258.3296493553. The cubic root of 39166690 is about 339.6036037766.

It can be divided in two parts, 391 and 66690, that added together give a square (67081 = 259²).

The spelling of 39166690 in words is "thirty-nine million, one hundred sixty-six thousand, six hundred ninety".