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28694295 = 3257711283
BaseRepresentation
bin110110101110…
…1011100010111
31222222211011200
41231131130113
524321204140
62503003543
7465616560
oct155353427
958884150
1028694295
11152194a3
1297395b3
135c38896
143b4d167
1527bc030
hex1b5d717

28694295 has 48 divisors (see below), whose sum is σ = 57687552. Its totient is φ = 12922560.

The previous prime is 28694273. The next prime is 28694333. The reversal of 28694295 is 59249682.

It is not a de Polignac number, because 28694295 - 26 = 28694231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28694295.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21724 + ... + 23006.

It is an arithmetic number, because the mean of its divisors is an integer number (1201824).

Almost surely, 228694295 is an apocalyptic number.

28694295 is an abundant number, since it is smaller than the sum of its proper divisors (28993257).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28694295 is a wasteful number, since it uses less digits than its factorization.

28694295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1369 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 28694295 is about 5356.7056107275. The cubic root of 28694295 is about 306.1483005365.

The spelling of 28694295 in words is "twenty-eight million, six hundred ninety-four thousand, two hundred ninety-five".

Divisors: 1 3 5 7 9 15 21 35 45 63 71 105 213 315 355 497 639 1065 1283 1491 2485 3195 3849 4473 6415 7455 8981 11547 19245 22365 26943 44905 57735 80829 91093 134715 273279 404145 455465 637651 819837 1366395 1912953 3188255 4099185 5738859 9564765 28694295