28140002421 has 16 divisors (see below), whose sum is σ = 39878192640. Its totient is φ = 17600079600.

The previous prime is 28140002413. The next prime is 28140002431. The reversal of 28140002421 is 12420004182.

It is not a de Polignac number, because 28140002421 - 2³ = 28140002413 is a prime.

It is a super-2 number, since 2×28140002421² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28140002391 and 28140002400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140002431) 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, 2390655 + ... + 2402396.

It is an arithmetic number, because the mean of its divisors is an integer number (2492387040).

Almost surely, 2^28140002421 is an apocalyptic number.

It is an amenable number.

28140002421 is a deficient number, since it is larger than the sum of its proper divisors (11738190219).

28140002421 is a wasteful number, since it uses less digits than its factorization.

28140002421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793176.

The product of its (nonzero) digits is 1024, while the sum is 24.

The spelling of 28140002421 in words is "twenty-eight billion, one hundred forty million, two thousand, four hundred twenty-one".