49639998 has 8 divisors (see below), whose sum is σ = 99280008. Its totient is φ = 16546664.

The previous prime is 49639991. The next prime is 49640009. The reversal of 49639998 is 89993694.

It is a sphenic number, since it is the product of 3 distinct primes.

49639998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49639991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4136661 + ... + 4136672.

It is an arithmetic number, because the mean of its divisors is an integer number (12410001).

Almost surely, 2^49639998 is an apocalyptic number.

49639998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

49639998 is a wasteful number, since it uses less digits than its factorization.

49639998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8273338.

The product of its digits is 3779136, while the sum is 57.

The square root of 49639998 is about 7045.5658395902. The cubic root of 49639998 is about 367.5168468375.

The spelling of 49639998 in words is "forty-nine million, six hundred thirty-nine thousand, nine hundred ninety-eight".