28415286623 has 4 divisors (see below), whose sum is σ = 28417457208. Its totient is φ = 28413116040.

The previous prime is 28415286577. The next prime is 28415286637. The reversal of 28415286623 is 32668251482.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32668251482 = 2 ⋅16334125741.

It is a cyclic number.

It is not a de Polignac number, because 28415286623 - 2¹⁰ = 28415285599 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 (28415286643) 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, 1065536 + ... + 1091877.

It is an arithmetic number, because the mean of its divisors is an integer number (7104364302).

Almost surely, 2^28415286623 is an apocalyptic number.

28415286623 is a deficient number, since it is larger than the sum of its proper divisors (2170585).

28415286623 is a wasteful number, since it uses less digits than its factorization.

28415286623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170584.

The product of its digits is 1105920, while the sum is 47.

The spelling of 28415286623 in words is "twenty-eight billion, four hundred fifteen million, two hundred eighty-six thousand, six hundred twenty-three".