39820149 has 12 divisors (see below), whose sum is σ = 58112236. Its totient is φ = 26272512.

The previous prime is 39820147. The next prime is 39820169. The reversal of 39820149 is 94102893.

It can be written as a sum of positive squares in 2 ways, for example, as 7535025 + 32285124 = 2745^2 + 5682^2 .

It is not a de Polignac number, because 39820149 - 2¹ = 39820147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39820141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21934 + ... + 23679.

Almost surely, 2^39820149 is an apocalyptic number.

It is an amenable number.

39820149 is a deficient number, since it is larger than the sum of its proper divisors (18292087).

39820149 is a wasteful number, since it uses less digits than its factorization.

39820149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45716 (or 45713 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 39820149 is about 6310.3208317803. The cubic root of 39820149 is about 341.4818510549.

The spelling of 39820149 in words is "thirty-nine million, eight hundred twenty thousand, one hundred forty-nine".