39893690 has 16 divisors (see below), whose sum is σ = 71881992. Its totient is φ = 15941184.

The previous prime is 39893677. The next prime is 39893699. The reversal of 39893690 is 9639893.

39893690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30791401 + 9102289 = 5549^2 + 3017^2 .

It is a super-2 number, since 2×39893690² = 3183013003632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39893699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15152 + ... + 17588.

Almost surely, 2^39893690 is an apocalyptic number.

39893690 is a deficient number, since it is larger than the sum of its proper divisors (31988302).

39893690 is a wasteful number, since it uses less digits than its factorization.

39893690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 39893690 is about 6316.1451851584. The cubic root of 39893690 is about 341.6919412858.

The spelling of 39893690 in words is "thirty-nine million, eight hundred ninety-three thousand, six hundred ninety".