439820149 has 8 divisors (see below), whose sum is σ = 442937880. Its totient is φ = 436709376.

The previous prime is 439820083. The next prime is 439820159. The reversal of 439820149 is 941028934.

It can be written as a sum of positive squares in 4 ways, for example, as 211266225 + 228553924 = 14535^2 + 15118^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 439820149 - 2²¹ = 437722997 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 (439820159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209497 + ... + 211585.

It is an arithmetic number, because the mean of its divisors is an integer number (55367235).

Almost surely, 2^439820149 is an apocalyptic number.

It is an amenable number.

439820149 is a deficient number, since it is larger than the sum of its proper divisors (3117731).

439820149 is a wasteful number, since it uses less digits than its factorization.

439820149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 439820149 is about 20971.8894952267. The cubic root of 439820149 is about 760.4868469985.

The spelling of 439820149 in words is "four hundred thirty-nine million, eight hundred twenty thousand, one hundred forty-nine".