50000040 has 48 divisors (see below), whose sum is σ = 162501300. Its totient is φ = 13333248.

The previous prime is 50000021. The next prime is 50000047. The reversal of 50000040 is 4000005.

It can be written as a sum of positive squares in 2 ways, for example, as 40525956 + 9474084 = 6366^2 + 3078^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 49999977 and 50000031.

It is not an unprimeable number, because it can be changed into a prime (50000047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69085 + ... + 69804.

Almost surely, 2^50000040 is an apocalyptic number.

It is an amenable number.

50000040 is an abundant number, since it is smaller than the sum of its proper divisors (112501260).

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

50000040 is a wasteful number, since it uses less digits than its factorization.

50000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138906 (or 138899 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 50000040 is about 7071.0706402920. The cubic root of 50000040 is about 368.4032481049.

Adding to 50000040 its reverse (4000005), we get a palindrome (54000045).

The spelling of 50000040 in words is "fifty million, forty", and thus it is an aban number, an eban number, and an uban number.