49399128 has 24 divisors (see below), whose sum is σ = 133789500. Its totient is φ = 16466352.

The previous prime is 49399121. The next prime is 49399139. The reversal of 49399128 is 82199394.

49399128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49399121) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 342978 + ... + 343121.

Almost surely, 2^49399128 is an apocalyptic number.

It is an amenable number.

49399128 is an abundant number, since it is smaller than the sum of its proper divisors (84390372).

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

49399128 is a wasteful number, since it uses less digits than its factorization.

49399128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686111 (or 686104 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 49399128 is about 7028.4513230156. The cubic root of 49399128 is about 366.9214442313.

The spelling of 49399128 in words is "forty-nine million, three hundred ninety-nine thousand, one hundred twenty-eight".