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157906 = 2711279
BaseRepresentation
bin100110100011010010
322000121101
4212203102
520023111
63215014
71225240
oct464322
9260541
10157906
11a8701
127746a
1356b48
1441790
1531bc1
hex268d2

157906 has 8 divisors (see below), whose sum is σ = 270720. Its totient is φ = 67668.

The previous prime is 157901. The next prime is 157907. The reversal of 157906 is 609751.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (157901) by changing a digit.

157906 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 in 3 ways as a sum of consecutive naturals, for example, 5626 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (33840).

2157906 is an apocalyptic number.

157906 is a deficient number, since it is larger than the sum of its proper divisors (112814).

157906 is a wasteful number, since it uses less digits than its factorization.

157906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11288.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 157906 is about 397.3738793630. The cubic root of 157906 is about 54.0504786329.

It can be divided in two parts, 15 and 7906, that added together give a square (7921 = 892).

The spelling of 157906 in words is "one hundred fifty-seven thousand, nine hundred six".

Divisors: 1 2 7 14 11279 22558 78953 157906