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805490 = 25737311
BaseRepresentation
bin11000100101001110010
31111220220222
43010221302
5201233430
625133042
76563240
oct3045162
91456828
10805490
115001a4
1232a182
1322282a
1416d790
1510d9e5
hexc4a72

805490 has 32 divisors (see below), whose sum is σ = 1707264. Its totient is φ = 267840.

The previous prime is 805487. The next prime is 805499. The reversal of 805490 is 94508.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (805499) 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, 2435 + ... + 2745.

It is an arithmetic number, because the mean of its divisors is an integer number (53352).

2805490 is an apocalyptic number.

805490 is an abundant number, since it is smaller than the sum of its proper divisors (901774).

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

805490 is a wasteful number, since it uses less digits than its factorization.

805490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 805490 is about 897.4909470296. The cubic root of 805490 is about 93.0436454481.

Adding to 805490 its reverse (94508), we get a palindrome (899998).

The spelling of 805490 in words is "eight hundred five thousand, four hundred ninety".

Divisors: 1 2 5 7 10 14 35 37 70 74 185 259 311 370 518 622 1295 1555 2177 2590 3110 4354 10885 11507 21770 23014 57535 80549 115070 161098 402745 805490