50136440 has 64 divisors (see below), whose sum is σ = 121716000. Its totient is φ = 18524160.

The previous prime is 50136439. The next prime is 50136461. The reversal of 50136440 is 4463105.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30356 + ... + 31964.

Almost surely, 2^50136440 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 50136440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60858000).

50136440 is an abundant number, since it is smaller than the sum of its proper divisors (71579560).

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

50136440 is a wasteful number, since it uses less digits than its factorization.

50136440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680 (or 1676 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 50136440 is about 7080.7090040475. The cubic root of 50136440 is about 368.7379450239.

Adding to 50136440 its reverse (4463105), we get a palindrome (54599545).

The spelling of 50136440 in words is "fifty million, one hundred thirty-six thousand, four hundred forty".