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28980295 = 513742307
BaseRepresentation
bin110111010001…
…1010001000111
32000112100111021
41232203101013
524404332140
62513052011
7501220441
oct156432107
960470437
1028980295
11153a4363
129857007
136008b06
143bc5491
152826b4a
hex1ba3447

28980295 has 8 divisors (see below), whose sum is σ = 35031024. Its totient is φ = 23014464.

The previous prime is 28980277. The next prime is 28980313. The reversal of 28980295 is 59208982.

It is an interprime number because it is at equal distance from previous prime (28980277) and next prime (28980313).

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

It is a cyclic number.

It is not a de Polignac number, because 28980295 - 211 = 28978247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20469 + ... + 21838.

It is an arithmetic number, because the mean of its divisors is an integer number (4378878).

Almost surely, 228980295 is an apocalyptic number.

28980295 is a deficient number, since it is larger than the sum of its proper divisors (6050729).

28980295 is a wasteful number, since it uses less digits than its factorization.

28980295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42449.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 28980295 is about 5383.3349329203. The cubic root of 28980295 is about 307.1620805914.

The spelling of 28980295 in words is "twenty-eight million, nine hundred eighty thousand, two hundred ninety-five".

Divisors: 1 5 137 685 42307 211535 5796059 28980295