49721320 has 48 divisors (see below), whose sum is σ = 122979780. Its totient is φ = 18078720.

The previous prime is 49721279. The next prime is 49721359. The reversal of 49721320 is 2312794.

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 2304324 = 6886^2 + 1518^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297 + ... + 9976.

Almost surely, 2^49721320 is an apocalyptic number.

49721320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49721320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61489890).

49721320 is an abundant number, since it is smaller than the sum of its proper divisors (73258460).

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

49721320 is a wasteful number, since it uses less digits than its factorization.

49721320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10306 (or 10291 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 49721320 is about 7051.3346254450. The cubic root of 49721320 is about 367.7174303743.

The spelling of 49721320 in words is "forty-nine million, seven hundred twenty-one thousand, three hundred twenty".