28340213631 has 16 divisors (see below), whose sum is σ = 38517386880. Its totient is φ = 18531534240.

The previous prime is 28340213617. The next prime is 28340213641. The reversal of 28340213631 is 13631204382.

It is not a de Polignac number, because 28340213631 - 2²³ = 28331825023 is a prime.

It is a super-3 number, since 3×28340213631³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 28340213592 and 28340213601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28340213641) 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, 374800 + ... + 444021.

It is an arithmetic number, because the mean of its divisors is an integer number (2407336680).

Almost surely, 2^28340213631 is an apocalyptic number.

28340213631 is a deficient number, since it is larger than the sum of its proper divisors (10177173249).

28340213631 is a wasteful number, since it uses less digits than its factorization.

28340213631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819046.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 28340213631 in words is "twenty-eight billion, three hundred forty million, two hundred thirteen thousand, six hundred thirty-one".