49438428 has 48 divisors (see below), whose sum is σ = 128249856. Its totient is φ = 14719680.

The previous prime is 49438427. The next prime is 49438439. The reversal of 49438428 is 82483494.

It is a super-2 number, since 2×49438428² = 4888316326222368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49438428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49438421) 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, 276 + ... + 9947.

It is an arithmetic number, because the mean of its divisors is an integer number (2671872).

Almost surely, 2^49438428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49438428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64124928).

49438428 is an abundant number, since it is smaller than the sum of its proper divisors (78811428).

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

49438428 is a wasteful number, since it uses less digits than its factorization.

49438428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10274 (or 10272 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 49438428 is about 7031.2465466658. The cubic root of 49438428 is about 367.0187211876.

The spelling of 49438428 in words is "forty-nine million, four hundred thirty-eight thousand, four hundred twenty-eight".