28252497 has 32 divisors (see below), whose sum is σ = 47633152. Its totient is φ = 14494464.

The previous prime is 28252489. The next prime is 28252507. The reversal of 28252497 is 79425282.

It is not a de Polignac number, because 28252497 - 2³ = 28252489 is a prime.

It is a super-3 number, since 3×28252497³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28252447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8703 + ... + 11499.

It is an arithmetic number, because the mean of its divisors is an integer number (1488536).

Almost surely, 2^28252497 is an apocalyptic number.

It is an amenable number.

28252497 is a deficient number, since it is larger than the sum of its proper divisors (19380655).

28252497 is a wasteful number, since it uses less digits than its factorization.

28252497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857.

The product of its digits is 80640, while the sum is 39.

The square root of 28252497 is about 5315.3077991778. The cubic root of 28252497 is about 304.5689404706.

The spelling of 28252497 in words is "twenty-eight million, two hundred fifty-two thousand, four hundred ninety-seven".