2728502021 has 8 divisors (see below), whose sum is σ = 3123696960. Its totient is φ = 2334659328.

The previous prime is 2728502017. The next prime is 2728502047. The reversal of 2728502021 is 1202058272.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2728502021 - 2² = 2728502017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728508021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333731 + ... + 341808.

It is an arithmetic number, because the mean of its divisors is an integer number (390462120).

Almost surely, 2^2728502021 is an apocalyptic number.

It is an amenable number.

2728502021 is a deficient number, since it is larger than the sum of its proper divisors (395194939).

2728502021 is an equidigital number, since it uses as much as digits as its factorization.

2728502021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676123.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 2728502021 is about 52235.0650521276. The cubic root of 2728502021 is about 1397.3593115348.

The spelling of 2728502021 in words is "two billion, seven hundred twenty-eight million, five hundred two thousand, twenty-one".