4402928721 has 4 divisors (see below), whose sum is σ = 5870571632. Its totient is φ = 2935285812.

The previous prime is 4402928681. The next prime is 4402928737. The reversal of 4402928721 is 1278292044.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4402928721 - 2⁶ = 4402928657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4402928721.

It is not an unprimeable number, because it can be changed into a prime (4402928021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733821451 + ... + 733821456.

It is an arithmetic number, because the mean of its divisors is an integer number (1467642908).

Almost surely, 2^4402928721 is an apocalyptic number.

It is an amenable number.

4402928721 is a deficient number, since it is larger than the sum of its proper divisors (1467642911).

4402928721 is a wasteful number, since it uses less digits than its factorization.

4402928721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467642910.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 4402928721 is about 66354.5681999363. The cubic root of 4402928721 is about 1639.0060307785.

The spelling of 4402928721 in words is "four billion, four hundred two million, nine hundred twenty-eight thousand, seven hundred twenty-one".