39690231 has 16 divisors (see below), whose sum is σ = 61768704. Its totient is φ = 22197024.

The previous prime is 39690229. The next prime is 39690239. The reversal of 39690231 is 13209693.

It is not a de Polignac number, because 39690231 - 2¹ = 39690229 is a prime.

It is a super-2 number, since 2×39690231² = 3150628873666722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39690192 and 39690201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39690239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19120 + ... + 21093.

It is an arithmetic number, because the mean of its divisors is an integer number (3860544).

Almost surely, 2^39690231 is an apocalyptic number.

39690231 is a deficient number, since it is larger than the sum of its proper divisors (22078473).

39690231 is a wasteful number, since it uses less digits than its factorization.

39690231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40270.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 39690231 is about 6300.0183333067. The cubic root of 39690231 is about 341.1100713052.

The spelling of 39690231 in words is "thirty-nine million, six hundred ninety thousand, two hundred thirty-one".