50000000 has 72 divisors (see below), whose sum is σ = 124511655.
Its totient is φ = 20000000.
The previous prime is 49999991. The next prime is 50000017. The reversal of 50000000 is 5.
It is a powerful number, because all its prime factors have an exponent greater than 1
and also an Achilles number because it is not a perfect power.
50000000 is nontrivially palindromic in base 7.
It can be written as a sum of positive squares in 5 ways, for example, as 47665216 + 2334784 = 6904^2 + 1528^2
It is an ABA number since it can be written as A⋅BA, here for A=2, B=5000.
It is a Harshad number since it is a multiple of its sum of digits (5).
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
It is a zygodrome in base 7.
It is an unprimeable number.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9999998 + ... + 10000002.
Almost surely, 250000000 is an apocalyptic number.
50000000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 50000000
50000000 is an abundant number, since it is smaller than the sum of its proper divisors (74511655).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
50000000 is an frugal number, since it uses more digits than its factorization.
50000000 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 54 (or 7 counting only the distinct ones).
The product of its (nonzero) digits is 5, while the sum is 5.
The square root of 50000000 is about 7071.0678118655.
The cubic root of 50000000 is about 368.4031498640.
The spelling of 50000000 in words is "fifty million", and is thus an aban number, an eban number, and an uban number.