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90285 = 3513463
BaseRepresentation
bin10110000010101101
311120211220
4112002231
510342120
61533553
7524136
oct260255
9146756
1090285
1161918
12442b9
1332130
1424c8d
151bb40
hex160ad

90285 has 16 divisors (see below), whose sum is σ = 155904. Its totient is φ = 44352.

The previous prime is 90281. The next prime is 90289. The reversal of 90285 is 58209.

90285 = T70 + T71 + ... + T95.

It is an interprime number because it is at equal distance from previous prime (90281) and next prime (90289).

It is not a de Polignac number, because 90285 - 22 = 90281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37 + ... + 426.

It is an arithmetic number, because the mean of its divisors is an integer number (9744).

290285 is an apocalyptic number.

It is an amenable number.

90285 is a deficient number, since it is larger than the sum of its proper divisors (65619).

90285 is a wasteful number, since it uses less digits than its factorization.

90285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 90285 is about 300.4746245526. The cubic root of 90285 is about 44.8613013383.

Adding to 90285 its sum of digits (24), we get a palindrome (90309).

The spelling of 90285 in words is "ninety thousand, two hundred eighty-five".

Divisors: 1 3 5 13 15 39 65 195 463 1389 2315 6019 6945 18057 30095 90285