49721445 has 32 divisors (see below), whose sum is σ = 89504640. Its totient is φ = 26512272.

The previous prime is 49721407. The next prime is 49721467. The reversal of 49721445 is 54412794.

It is a happy number.

It is not a de Polignac number, because 49721445 - 2¹⁵ = 49688677 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8662 + ... + 13208.

It is an arithmetic number, because the mean of its divisors is an integer number (2797020).

Almost surely, 2^49721445 is an apocalyptic number.

49721445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

49721445 is a deficient number, since it is larger than the sum of its proper divisors (39783195).

49721445 is an frugal number, since it uses more digits than its factorization.

49721445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573 (or 4555 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 49721445 is about 7051.3434890097. The cubic root of 49721445 is about 367.7177385227.

The spelling of 49721445 in words is "forty-nine million, seven hundred twenty-one thousand, four hundred forty-five".