28657271700 has 54 divisors (see below), whose sum is σ = 89824628894. Its totient is φ = 7641938880.

The previous prime is 28657271677. The next prime is 28657271723. The reversal of 28657271700 is 717275682.

28657271700 is a `hidden beast` number, since 2 + 8 + 6 + 572 + 7 + 1 + 70 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (28657271677) and next prime (28657271723).

It can be written as a sum of positive squares in 3 ways, for example, as 616429584 + 28040842116 = 24828^2 + 167454^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15919807 + ... + 15921606.

Almost surely, 2^28657271700 is an apocalyptic number.

28657271700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28657271700 is an abundant number, since it is smaller than the sum of its proper divisors (61167357194).

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

28657271700 is a wasteful number, since it uses less digits than its factorization.

28657271700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31841433 (or 31841423 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 28657271700 in words is "twenty-eight billion, six hundred fifty-seven million, two hundred seventy-one thousand, seven hundred".