Search a number
-
+
161728406 = 2737312217
BaseRepresentation
bin10011010001111…
…00011110010110
3102021022122122222
421220330132112
5312400302111
624014222342
74002445250
oct1150743626
9367278588
10161728406
1183322a44
12461b49b2
13276773a8
141769ccd0
15e2e97db
hex9a3c796

161728406 has 16 divisors (see below), whose sum is σ = 284742816. Its totient is φ = 67438656.

The previous prime is 161728393. The next prime is 161728417. The reversal of 161728406 is 604827161.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155591 + ... + 156626.

It is an arithmetic number, because the mean of its divisors is an integer number (17796426).

Almost surely, 2161728406 is an apocalyptic number.

161728406 is a deficient number, since it is larger than the sum of its proper divisors (123014410).

161728406 is a wasteful number, since it uses less digits than its factorization.

161728406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312263.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 161728406 is about 12717.2483659005. The cubic root of 161728406 is about 544.8313660574.

The spelling of 161728406 in words is "one hundred sixty-one million, seven hundred twenty-eight thousand, four hundred six".

Divisors: 1 2 7 14 37 74 259 518 312217 624434 2185519 4371038 11552029 23104058 80864203 161728406