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161836 = 2240459
BaseRepresentation
bin100111100000101100
322012222221
4213200230
520134321
63245124
71242553
oct474054
9265887
10161836
11100654
12797a4
135887c
1442d9a
1532e41
hex2782c

161836 has 6 divisors (see below), whose sum is σ = 283220. Its totient is φ = 80916.

The previous prime is 161831. The next prime is 161839. The reversal of 161836 is 638161.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 161836.

It is not an unprimeable number, because it can be changed into a prime (161831) by changing a digit.

161836 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20226 + ... + 20233.

2161836 is an apocalyptic number.

It is an amenable number.

161836 is a deficient number, since it is larger than the sum of its proper divisors (121384).

161836 is a wasteful number, since it uses less digits than its factorization.

161836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40463 (or 40461 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 161836 is about 402.2884537244. The cubic root of 161836 is about 54.4952160321.

Adding to 161836 its reverse (638161), we get a palindrome (799997).

The spelling of 161836 in words is "one hundred sixty-one thousand, eight hundred thirty-six".

Divisors: 1 2 4 40459 80918 161836