28697753 has 4 divisors (see below), whose sum is σ = 32797440. Its totient is φ = 24598068.

The previous prime is 28697743. The next prime is 28697761. The reversal of 28697753 is 35779682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35779682 = 2 ⋅17889841.

It is a cyclic number.

It is not a de Polignac number, because 28697753 - 2⁴ = 28697737 is a prime.

It is a super-2 number, since 2×28697753² = 1647122054498018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28697698 and 28697707.

It is not an unprimeable number, because it can be changed into a prime (28697743) 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, 2049833 + ... + 2049846.

It is an arithmetic number, because the mean of its divisors is an integer number (8199360).

Almost surely, 2^28697753 is an apocalyptic number.

It is an amenable number.

28697753 is a deficient number, since it is larger than the sum of its proper divisors (4099687).

28697753 is an equidigital number, since it uses as much as digits as its factorization.

28697753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4099686.

The product of its digits is 635040, while the sum is 47.

The square root of 28697753 is about 5357.0283740148. The cubic root of 28697753 is about 306.1605981994.

The spelling of 28697753 in words is "twenty-eight million, six hundred ninety-seven thousand, seven hundred fifty-three".