49840021 has 36 divisors (see below), whose sum is σ = 66482976. Its totient is φ = 36566640.

The previous prime is 49840019. The next prime is 49840081. The reversal of 49840021 is 12004894.

It is not a de Polignac number, because 49840021 - 2¹ = 49840019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49840081) 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 35 ways as a sum of consecutive naturals, for example, 305686 + ... + 305848.

Almost surely, 2^49840021 is an apocalyptic number.

It is an amenable number.

49840021 is a deficient number, since it is larger than the sum of its proper divisors (16642955).

49840021 is a wasteful number, since it uses less digits than its factorization.

49840021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 49840021 is about 7059.7465251948. The cubic root of 49840021 is about 368.0098182833.

The spelling of 49840021 in words is "forty-nine million, eight hundred forty thousand, twenty-one".