28547475477 has 4 divisors (see below), whose sum is σ = 38063300640. Its totient is φ = 19031650316.

The previous prime is 28547475469. The next prime is 28547475511. The reversal of 28547475477 is 77457474582.

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 a cyclic number.

It is not a de Polignac number, because 28547475477 - 2³ = 28547475469 is a prime.

It is a super-2 number, since 2×28547475477² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28547475477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28547475427) 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, 4757912577 + ... + 4757912582.

It is an arithmetic number, because the mean of its divisors is an integer number (9515825160).

Almost surely, 2^28547475477 is an apocalyptic number.

It is an amenable number.

28547475477 is a deficient number, since it is larger than the sum of its proper divisors (9515825163).

28547475477 is an equidigital number, since it uses as much as digits as its factorization.

28547475477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9515825162.

The product of its digits is 61465600, while the sum is 60.

The spelling of 28547475477 in words is "twenty-eight billion, five hundred forty-seven million, four hundred seventy-five thousand, four hundred seventy-seven".