49991970 has 64 divisors (see below), whose sum is σ = 138537216. Its totient is φ = 11308800.

The previous prime is 49991927. The next prime is 49991993. The reversal of 49991970 is 7919994.

49991970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 20032 + ... + 22388.

It is an arithmetic number, because the mean of its divisors is an integer number (2164644).

Almost surely, 2^49991970 is an apocalyptic number.

It is a pronic number, being equal to 7070×7071.

It is a practical number, because each smaller number is the sum of distinct divisors of 49991970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69268608).

49991970 is an abundant number, since it is smaller than the sum of its proper divisors (88545246).

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

49991970 is a wasteful number, since it uses less digits than its factorization.

49991970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475.

The product of its (nonzero) digits is 183708, while the sum is 48.

The square root of 49991970 is about 7070.4999823209. The cubic root of 49991970 is about 368.3834269595.

The spelling of 49991970 in words is "forty-nine million, nine hundred ninety-one thousand, nine hundred seventy".