Search a number
-
+
157444 = 2275623
BaseRepresentation
bin100110011100000100
321222222021
4212130010
520014234
63212524
71224010
oct463404
9258867
10157444
11a8321
1277144
1356881
1441540
15319b4
hex26704

157444 has 12 divisors (see below), whose sum is σ = 314944. Its totient is φ = 67464.

The previous prime is 157433. The next prime is 157457. The reversal of 157444 is 444751.

157444 = 232 + 242 + ... + 782.

157444 is an admirable number.

It is a super-2 number, since 2×1574442 = 49577226272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2784 + ... + 2839.

2157444 is an apocalyptic number.

157444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

157444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

157444 is a wasteful number, since it uses less digits than its factorization.

157444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634 (or 5632 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 157444 is about 396.7921370189. The cubic root of 157444 is about 53.9977136663.

The spelling of 157444 in words is "one hundred fifty-seven thousand, four hundred forty-four".

Divisors: 1 2 4 7 14 28 5623 11246 22492 39361 78722 157444