49999840 has 48 divisors (see below), whose sum is σ = 128867760. Its totient is φ = 18181120.

The previous prime is 49999819. The next prime is 49999843. The reversal of 49999840 is 4899994.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49999843) 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 7 ways as a sum of consecutive naturals, for example, 12445 + ... + 15964.

It is an arithmetic number, because the mean of its divisors is an integer number (2684745).

Almost surely, 2^49999840 is an apocalyptic number.

49999840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

49999840 is an abundant number, since it is smaller than the sum of its proper divisors (78867920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49999840 is a wasteful number, since it uses less digits than its factorization.

49999840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28435 (or 28427 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 49999840 is about 7071.0564981479. The cubic root of 49999840 is about 368.4027569003.

The spelling of 49999840 in words is "forty-nine million, nine hundred ninety-nine thousand, eight hundred forty".