49128642 has 24 divisors (see below), whose sum is σ = 112048560. Its totient is φ = 15514200.

The previous prime is 49128641. The next prime is 49128643. The reversal of 49128642 is 24682194.

49128642 is a `hidden beast` number, since 4 + 9 + 1 + 2 + 8 + 642 = 666.

49128642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (49128641) and next prime (49128643).

It is a junction number, because it is equal to n+sod(n) for n = 49128597 and 49128606.

It is not an unprimeable number, because it can be changed into a prime (49128641) 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 11 ways as a sum of consecutive naturals, for example, 71484 + ... + 72167.

It is an arithmetic number, because the mean of its divisors is an integer number (4668690).

Almost surely, 2^49128642 is an apocalyptic number.

49128642 is an abundant number, since it is smaller than the sum of its proper divisors (62919918).

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

49128642 is a wasteful number, since it uses less digits than its factorization.

49128642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143678 (or 143675 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 49128642 is about 7009.1826912986. The cubic root of 49128642 is about 366.2505227388.

It can be divided in two parts, 49128 and 642, that added together give a triangular number (49770 = T₃₁₅).

The spelling of 49128642 in words is "forty-nine million, one hundred twenty-eight thousand, six hundred forty-two".