28407926505 has 16 divisors (see below), whose sum is σ = 51945922944. Its totient is φ = 12986480640.

The previous prime is 28407926453. The next prime is 28407926507. The reversal of 28407926505 is 50562970482.

It is not a de Polignac number, because 28407926505 - 2⁶ = 28407926441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28407926507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135275736 + ... + 135275945.

It is an arithmetic number, because the mean of its divisors is an integer number (3246620184).

Almost surely, 2^28407926505 is an apocalyptic number.

It is an amenable number.

28407926505 is a deficient number, since it is larger than the sum of its proper divisors (23537996439).

28407926505 is a wasteful number, since it uses less digits than its factorization.

28407926505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270551696.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 28407926505 in words is "twenty-eight billion, four hundred seven million, nine hundred twenty-six thousand, five hundred five".