28297727541 has 20 divisors (see below), whose sum is σ = 43254987072. Its totient is φ = 18426424968.

The previous prime is 28297727533. The next prime is 28297727567. The reversal of 28297727541 is 14572779282.

28297727541 is a `hidden beast` number, since 2 + 8 + 2 + 9 + 77 + 27 + 541 = 666.

It is not a de Polignac number, because 28297727541 - 2³ = 28297727533 is a prime.

It is a super-2 number, since 2×28297727541² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297727141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4058781 + ... + 4065746.

Almost surely, 2^28297727541 is an apocalyptic number.

It is an amenable number.

28297727541 is a deficient number, since it is larger than the sum of its proper divisors (14957259531).

28297727541 is an equidigital number, since it uses as much as digits as its factorization.

28297727541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8124582 (or 8124573 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The spelling of 28297727541 in words is "twenty-eight billion, two hundred ninety-seven million, seven hundred twenty-seven thousand, five hundred forty-one".