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5721728 = 2744701
BaseRepresentation
bin10101110100111010000000
3101202200201212
4111310322000
52431043403
6322345252
766430265
oct25647200
911680655
105721728
113258901
121abb228
13125444c
14a8d26c
157804d8
hex574e80

5721728 has 16 divisors (see below), whose sum is σ = 11399010. Its totient is φ = 2860800.

The previous prime is 5721719. The next prime is 5721743. The reversal of 5721728 is 8271275.

It can be written as a sum of positive squares in only one way, i.e., 5721664 + 64 = 2392^2 + 8^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 5721694 and 5721703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22223 + ... + 22478.

Almost surely, 25721728 is an apocalyptic number.

It is an amenable number.

5721728 is a deficient number, since it is larger than the sum of its proper divisors (5677282).

5721728 is an equidigital number, since it uses as much as digits as its factorization.

5721728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44715 (or 44703 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 5721728 is about 2392.0133778890. The cubic root of 5721728 is about 178.8582880128.

The spelling of 5721728 in words is "five million, seven hundred twenty-one thousand, seven hundred twenty-eight".