49240809 has 6 divisors (see below), whose sum is σ = 71125626. Its totient is φ = 32827200.

The previous prime is 49240801. The next prime is 49240813. The reversal of 49240809 is 90804294.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 48608784 + 632025 = 6972^2 + 795^2 .

It is not a de Polignac number, because 49240809 - 2³ = 49240801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49240801) 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 5 ways as a sum of consecutive naturals, for example, 2735592 + ... + 2735609.

It is an arithmetic number, because the mean of its divisors is an integer number (11854271).

Almost surely, 2^49240809 is an apocalyptic number.

It is an amenable number.

49240809 is a deficient number, since it is larger than the sum of its proper divisors (21884817).

49240809 is a wasteful number, since it uses less digits than its factorization.

49240809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471207 (or 5471204 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 49240809 is about 7017.1795616188. The cubic root of 49240809 is about 366.5290432090.

The spelling of 49240809 in words is "forty-nine million, two hundred forty thousand, eight hundred nine".