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70830 = 2325787
BaseRepresentation
bin10001010010101110
310121011100
4101102232
54231310
61303530
7413334
oct212256
9117140
1070830
1149241
1234ba6
1326316
141bb54
1515ec0
hex114ae

70830 has 24 divisors (see below), whose sum is σ = 184392. Its totient is φ = 18864.

The previous prime is 70823. The next prime is 70841. The reversal of 70830 is 3807.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (7683).

270830 is an apocalyptic number.

70830 is an abundant number, since it is smaller than the sum of its proper divisors (113562).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92196).

70830 is a wasteful number, since it uses less digits than its factorization.

70830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 70830 is about 266.1390613946. The cubic root of 70830 is about 41.3751023020.

It can be divided in two parts, 70 and 830, that added together give a square (900 = 302).

The spelling of 70830 in words is "seventy thousand, eight hundred thirty".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 787 1574 2361 3935 4722 7083 7870 11805 14166 23610 35415 70830