28635221138260 has 24 divisors (see below), whose sum is σ = 65600688426336. Its totient is φ = 10412807686560.

The previous prime is 28635221138243. The next prime is 28635221138267. The reversal of 28635221138260 is 6283112253682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28635221138267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65080047822 + ... + 65080048261.

It is an arithmetic number, because the mean of its divisors is an integer number (2733362017764).

Almost surely, 2^{28635221138260} is an apocalyptic number.

28635221138260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28635221138260 is an abundant number, since it is smaller than the sum of its proper divisors (36965467288076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28635221138260 is a wasteful number, since it uses less digits than its factorization.

28635221138260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130160096103 (or 130160096101 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 28635221138260 in words is "twenty-eight trillion, six hundred thirty-five billion, two hundred twenty-one million, one hundred thirty-eight thousand, two hundred sixty".