50388440 has 64 divisors (see below), whose sum is σ = 116912160. Its totient is φ = 19537920.

The previous prime is 50388421. The next prime is 50388449. The reversal of 50388440 is 4488305.

It is a junction number, because it is equal to n+sod(n) for n = 50388397 and 50388406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50388449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260984 + ... + 261176.

Almost surely, 2^50388440 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 50388440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58456080).

50388440 is an abundant number, since it is smaller than the sum of its proper divisors (66523720).

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

50388440 is a wasteful number, since it uses less digits than its factorization.

50388440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 50388440 is about 7098.4815277635. The cubic root of 50388440 is about 369.3547067469.

The spelling of 50388440 in words is "fifty million, three hundred eighty-eight thousand, four hundred forty".