49128820 has 24 divisors (see below), whose sum is σ = 111107304. Its totient is φ = 18139776.

The previous prime is 49128811. The next prime is 49128839. The reversal of 49128820 is 2882194.

It can be written as a sum of positive squares in 4 ways, for example, as 156816 + 48972004 = 396^2 + 6998^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94219 + ... + 94738.

It is an arithmetic number, because the mean of its divisors is an integer number (4629471).

Almost surely, 2^49128820 is an apocalyptic number.

It is an amenable number.

49128820 is an abundant number, since it is smaller than the sum of its proper divisors (61978484).

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

49128820 is a wasteful number, since it uses less digits than its factorization.

49128820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188979 (or 188977 counting only the distinct ones).

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

The square root of 49128820 is about 7009.1953889159. The cubic root of 49128820 is about 366.2509650640.

The spelling of 49128820 in words is "forty-nine million, one hundred twenty-eight thousand, eight hundred twenty".