49000000 has 147 divisors (see below), whose sum is σ = 141384909.
Its totient is φ = 16800000.
The previous prime is 48999989. The next prime is 49000027. The reversal of 49000000 is 94.
Multipling 49000000 by its product of nonzero digits (36), we get a square (1764000000 = 420002).
Adding to 49000000 its reverse (94), we get a palindrome (49000094).
It can be divided in two parts, 4 and 9000000, that multiplied together give a square (36000000 = 60002).
It is a happy number.
The square root of 49000000 is 7000.
It is a perfect power (a square), and thus also a powerful number.
49000000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 3 ways, for example, as 42928704 + 6071296 = 6552^2 + 2464^2
It is a Duffinian number.
It is a zygodrome in base 7.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 6999997 + ... + 7000003.
Almost surely, 249000000 is an apocalyptic number.
49000000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.
49000000 is the 7000-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 49000000
49000000 is an abundant number, since it is smaller than the sum of its proper divisors (92384909).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
49000000 is an frugal number, since it uses more digits than its factorization.
49000000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 56 (or 14 counting only the distinct ones).
The product of its (nonzero) digits is 36, while the sum is 13.
The cubic root of 49000000 is about 365.9305710023.
The spelling of 49000000 in words is "forty-nine million", and thus it is an aban number and an uban number.