50409840 has 160 divisors (see below), whose sum is σ = 170989056. Its totient is φ = 12211200.

The previous prime is 50409823. The next prime is 50409883. The reversal of 50409840 is 4890405.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 50409798 and 50409807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333765 + ... + 333915.

Almost surely, 2^50409840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50409840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85494528).

50409840 is an abundant number, since it is smaller than the sum of its proper divisors (120579216).

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

50409840 is a wasteful number, since it uses less digits than its factorization.

50409840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 50409840 is about 7099.9887323854. The cubic root of 50409840 is about 369.4069877331.

The spelling of 50409840 in words is "fifty million, four hundred nine thousand, eight hundred forty".