2728532421 has 24 divisors (see below), whose sum is σ = 3985057440. Its totient is φ = 1798847136.

The previous prime is 2728532413. The next prime is 2728532423. The reversal of 2728532421 is 1242358272.

It is not a de Polignac number, because 2728532421 - 2³ = 2728532413 is a prime.

It is a super-3 number, since 3×2728532421³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728532423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 626670 + ... + 631008.

It is an arithmetic number, because the mean of its divisors is an integer number (166044060).

Almost surely, 2^2728532421 is an apocalyptic number.

It is an amenable number.

2728532421 is a deficient number, since it is larger than the sum of its proper divisors (1256525019).

2728532421 is a wasteful number, since it uses less digits than its factorization.

2728532421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105 (or 5102 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 2728532421 is about 52235.3560435841. The cubic root of 2728532421 is about 1397.3645011425.

The spelling of 2728532421 in words is "two billion, seven hundred twenty-eight million, five hundred thirty-two thousand, four hundred twenty-one".