28397853 has 36 divisors (see below), whose sum is σ = 45749340. Its totient is φ = 16959360.

The previous prime is 28397797. The next prime is 28397861. The reversal of 28397853 is 35879382.

It can be written as a sum of positive squares in 2 ways, for example, as 17288964 + 11108889 = 4158^2 + 3333^2 .

It is not a de Polignac number, because 28397853 - 2⁸ = 28397597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28397799 and 28397808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28397053) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96775 + ... + 97067.

It is an arithmetic number, because the mean of its divisors is an integer number (1270815).

Almost surely, 2^28397853 is an apocalyptic number.

It is an amenable number.

28397853 is a deficient number, since it is larger than the sum of its proper divisors (17351487).

28397853 is a wasteful number, since it uses less digits than its factorization.

28397853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 396 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28397853 is about 5328.9635952969. The cubic root of 28397853 is about 305.0903718584.

The spelling of 28397853 in words is "twenty-eight million, three hundred ninety-seven thousand, eight hundred fifty-three".