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400641 = 3831609
BaseRepresentation
bin1100001110100000001
3202100120120
41201310001
5100310031
612330453
73256023
oct1416401
9670516
10400641
1125400a
12173a29
13110487
14a6013
157da96
hex61d01

400641 has 8 divisors (see below), whose sum is σ = 540960. Its totient is φ = 263712.

The previous prime is 400619. The next prime is 400643. The reversal of 400641 is 146004.

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

It is not a de Polignac number, because 400641 - 210 = 399617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400641.

It is not an unprimeable number, because it can be changed into a prime (400643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 556 + ... + 1053.

It is an arithmetic number, because the mean of its divisors is an integer number (67620).

2400641 is an apocalyptic number.

It is an amenable number.

400641 is a deficient number, since it is larger than the sum of its proper divisors (140319).

400641 is a wasteful number, since it uses less digits than its factorization.

400641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 400641 is about 632.9620841725. The cubic root of 400641 is about 73.7199667044.

Adding to 400641 its reverse (146004), we get a palindrome (546645).

The spelling of 400641 in words is "four hundred thousand, six hundred forty-one".

Divisors: 1 3 83 249 1609 4827 133547 400641