49784280 has 256 divisors, whose sum is σ = 189665280. Its totient is φ = 10174464.

The previous prime is 49784269. The next prime is 49784281. The reversal of 49784280 is 8248794.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49784281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 513192 + ... + 513288.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^49784280 is an apocalyptic number.

49784280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

49784280 is the 4074-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49784280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94832640).

49784280 is an abundant number, since it is smaller than the sum of its proper divisors (139881000).

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

49784280 is a wasteful number, since it uses less digits than its factorization.

49784280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 49784280 is about 7055.7976161452. The cubic root of 49784280 is about 367.8725732410.

The spelling of 49784280 in words is "forty-nine million, seven hundred eighty-four thousand, two hundred eighty".