49997658 has 16 divisors (see below), whose sum is σ = 100438560. Its totient is φ = 16592016.

The previous prime is 49997617. The next prime is 49997687. The reversal of 49997658 is 85679994.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 49997598 and 49997607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16993 + ... + 19716.

It is an arithmetic number, because the mean of its divisors is an integer number (6277410).

Almost surely, 2^49997658 is an apocalyptic number.

49997658 is an abundant number, since it is smaller than the sum of its proper divisors (50440902).

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

49997658 is a wasteful number, since it uses less digits than its factorization.

49997658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36941.

The product of its digits is 4898880, while the sum is 57.

The square root of 49997658 is about 7070.9022055180. The cubic root of 49997658 is about 368.3973977730.

The spelling of 49997658 in words is "forty-nine million, nine hundred ninety-seven thousand, six hundred fifty-eight".