44900721 has 12 divisors (see below), whose sum is σ = 66609972. Its totient is φ = 29124576.

The previous prime is 44900719. The next prime is 44900747. The reversal of 44900721 is 12700944.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28740321 + 16160400 = 5361^2 + 4020^2 .

It is not a de Polignac number, because 44900721 - 2¹ = 44900719 is a prime.

It is a super-4 number, since 4×44900721⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (44900771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67086 + ... + 67751.

It is an arithmetic number, because the mean of its divisors is an integer number (5550831).

Almost surely, 2^44900721 is an apocalyptic number.

It is an amenable number.

44900721 is a deficient number, since it is larger than the sum of its proper divisors (21709251).

44900721 is a wasteful number, since it uses less digits than its factorization.

44900721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134880 (or 134877 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 44900721 is about 6700.8000268625. The cubic root of 44900721 is about 355.4275639178.

The spelling of 44900721 in words is "forty-four million, nine hundred thousand, seven hundred twenty-one".