28301027391 has 48 divisors (see below), whose sum is σ = 50332498944. Its totient is φ = 14922211392.

The previous prime is 28301027371. The next prime is 28301027437. The reversal of 28301027391 is 19372010382.

It is not a de Polignac number, because 28301027391 - 2¹³ = 28301019199 is a prime.

It is a super-2 number, since 2×28301027391² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28301027371) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2834490 + ... + 2844456.

It is an arithmetic number, because the mean of its divisors is an integer number (1048593728).

Almost surely, 2^28301027391 is an apocalyptic number.

28301027391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28301027391 is a deficient number, since it is larger than the sum of its proper divisors (22031471553).

28301027391 is a wasteful number, since it uses less digits than its factorization.

28301027391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13460 (or 13457 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 28301027391 in words is "twenty-eight billion, three hundred one million, twenty-seven thousand, three hundred ninety-one".