28343257660 has 12 divisors (see below), whose sum is σ = 59520841128. Its totient is φ = 11337303056.

The previous prime is 28343257651. The next prime is 28343257669. The reversal of 28343257660 is 6675234382.

It is an interprime number because it is at equal distance from previous prime (28343257651) and next prime (28343257669).

It is a super-2 number, since 2×28343257660² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28343257660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28343257669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708581422 + ... + 708581461.

It is an arithmetic number, because the mean of its divisors is an integer number (4960070094).

Almost surely, 2^28343257660 is an apocalyptic number.

28343257660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28343257660 is an abundant number, since it is smaller than the sum of its proper divisors (31177583468).

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

28343257660 is a wasteful number, since it uses less digits than its factorization.

28343257660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417162892 (or 1417162890 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 28343257660 in words is "twenty-eight billion, three hundred forty-three million, two hundred fifty-seven thousand, six hundred sixty".