28662258477 has 4 divisors (see below), whose sum is σ = 38216344640. Its totient is φ = 19108172316.

The previous prime is 28662258433. The next prime is 28662258481. The reversal of 28662258477 is 77485226682.

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 not a de Polignac number, because 28662258477 - 2⁸ = 28662258221 is a prime.

It is a super-2 number, since 2×28662258477² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28662238477) 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, 4777043077 + ... + 4777043082.

It is an arithmetic number, because the mean of its divisors is an integer number (9554086160).

Almost surely, 2^28662258477 is an apocalyptic number.

It is an amenable number.

28662258477 is a deficient number, since it is larger than the sum of its proper divisors (9554086163).

28662258477 is an equidigital number, since it uses as much as digits as its factorization.

28662258477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554086162.

The product of its digits is 18063360, while the sum is 57.

The spelling of 28662258477 in words is "twenty-eight billion, six hundred sixty-two million, two hundred fifty-eight thousand, four hundred seventy-seven".