Search a number
-
+
40989 = 3131051
BaseRepresentation
bin1010000000011101
32002020010
422000131
52302424
6513433
7230334
oct120035
962203
1040989
1128883
121b879
1315870
1410d1b
15c229
hexa01d

40989 has 8 divisors (see below), whose sum is σ = 58912. Its totient is φ = 25200.

The previous prime is 40973. The next prime is 40993. The reversal of 40989 is 98904.

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

It is not a de Polignac number, because 40989 - 24 = 40973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40989.

It is not an unprimeable number, because it can be changed into a prime (40939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487 + ... + 564.

It is an arithmetic number, because the mean of its divisors is an integer number (7364).

240989 is an apocalyptic number.

It is an amenable number.

40989 is a deficient number, since it is larger than the sum of its proper divisors (17923).

40989 is a wasteful number, since it uses less digits than its factorization.

40989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 40989 is about 202.4574029271. The cubic root of 40989 is about 34.4790883565.

The spelling of 40989 in words is "forty thousand, nine hundred eighty-nine".

Divisors: 1 3 13 39 1051 3153 13663 40989