49880721 has 16 divisors (see below), whose sum is σ = 75709440. Its totient is φ = 28915920.

The previous prime is 49880717. The next prime is 49880849. The reversal of 49880721 is 12708894.

It is not a de Polignac number, because 49880721 - 2² = 49880717 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49880721.

It is not an unprimeable number, because it can be changed into a prime (49880021) 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, 32101 + ... + 33618.

It is an arithmetic number, because the mean of its divisors is an integer number (4731840).

Almost surely, 2^49880721 is an apocalyptic number.

It is an amenable number.

49880721 is a deficient number, since it is larger than the sum of its proper divisors (25828719).

49880721 is a wasteful number, since it uses less digits than its factorization.

49880721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65756.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 49880721 is about 7062.6284767075. The cubic root of 49880721 is about 368.1099648728.

The spelling of 49880721 in words is "forty-nine million, eight hundred eighty thousand, seven hundred twenty-one".