49280128 has 16 divisors (see below), whose sum is σ = 98175510. Its totient is φ = 24640000.

The previous prime is 49280123. The next prime is 49280137. The reversal of 49280128 is 82108294.

It can be written as a sum of positive squares in only one way, i.e., 38044224 + 11235904 = 6168^2 + 3352^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 49280093 and 49280102.

It is not an unprimeable number, because it can be changed into a prime (49280123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192373 + ... + 192628.

Almost surely, 2^49280128 is an apocalyptic number.

It is an amenable number.

49280128 is a deficient number, since it is larger than the sum of its proper divisors (48895382).

49280128 is an equidigital number, since it uses as much as digits as its factorization.

49280128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385015 (or 385003 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 49280128 is about 7019.9806267539. The cubic root of 49280128 is about 366.6265755983.

The spelling of 49280128 in words is "forty-nine million, two hundred eighty thousand, one hundred twenty-eight".