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28685253 = 319948049
BaseRepresentation
bin110110101101…
…1001111000101
31222222100202210
41231123033011
524320412003
62502454033
7465551322
oct155331705
958870683
1028685253
1115212723
129734319
135c3472c
143b49b49
1527b9503
hex1b5b3c5

28685253 has 8 divisors (see below), whose sum is σ = 38440000. Its totient is φ = 19027008.

The previous prime is 28685233. The next prime is 28685297. The reversal of 28685253 is 35258682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28685253 - 25 = 28685221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28685213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23428 + ... + 24621.

It is an arithmetic number, because the mean of its divisors is an integer number (4805000).

Almost surely, 228685253 is an apocalyptic number.

It is an amenable number.

28685253 is a deficient number, since it is larger than the sum of its proper divisors (9754747).

28685253 is a wasteful number, since it uses less digits than its factorization.

28685253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48251.

The product of its digits is 115200, while the sum is 39.

The square root of 28685253 is about 5355.8615553429. The cubic root of 28685253 is about 306.1161398608.

The spelling of 28685253 in words is "twenty-eight million, six hundred eighty-five thousand, two hundred fifty-three".

Divisors: 1 3 199 597 48049 144147 9561751 28685253