49428 has 18 divisors (see below), whose sum is σ = 125034. Its totient is φ = 16464.

The previous prime is 49417. The next prime is 49429. The reversal of 49428 is 82494.

It can be written as a sum of positive squares in only one way, i.e., 49284 + 144 = 222^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49429) by changing a digit.

49428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 651 + ... + 722.

2⁴⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

49428 is an abundant number, since it is smaller than the sum of its proper divisors (75606).

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

49428 is a wasteful number, since it uses less digits than its factorization.

49428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383 (or 1378 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 49428 is about 222.3240877638. The cubic root of 49428 is about 36.6992914405.

Adding to 49428 its sum of digits (27), we get a triangular number (49455 = T₃₁₄).

It can be divided in two parts, 4942 and 8, that added together give a triangular number (4950 = T₉₉).

The spelling of 49428 in words is "forty-nine thousand, four hundred twenty-eight".