49309128 has 64 divisors (see below), whose sum is σ = 149428800. Its totient is φ = 14941440.

The previous prime is 49309121. The next prime is 49309151. The reversal of 49309128 is 82190394.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 49309092 and 49309101.

It is not an unprimeable number, because it can be changed into a prime (49309121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8001 + ... + 12752.

It is an arithmetic number, because the mean of its divisors is an integer number (2334825).

Almost surely, 2^49309128 is an apocalyptic number.

It is an amenable number.

49309128 is an abundant number, since it is smaller than the sum of its proper divisors (100119672).

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

49309128 is a wasteful number, since it uses less digits than its factorization.

49309128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20779 (or 20769 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 49309128 is about 7022.0458557318. The cubic root of 49309128 is about 366.6984780481.

The spelling of 49309128 in words is "forty-nine million, three hundred nine thousand, one hundred twenty-eight".