49920128 has 16 divisors (see below), whose sum is σ = 99450510. Its totient is φ = 24960000.

The previous prime is 49920127. The next prime is 49920131. The reversal of 49920128 is 82102994.

It can be written as a sum of positive squares in only one way, i.e., 26956864 + 22963264 = 5192^2 + 4792^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (49920127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194873 + ... + 195128.

Almost surely, 2^49920128 is an apocalyptic number.

It is an amenable number.

49920128 is a deficient number, since it is larger than the sum of its proper divisors (49530382).

49920128 is an equidigital number, since it uses as much as digits as its factorization.

49920128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390015 (or 390003 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 49920128 is about 7065.4177512727. The cubic root of 49920128 is about 368.2068780068.

The spelling of 49920128 in words is "forty-nine million, nine hundred twenty thousand, one hundred twenty-eight".