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404004042 = 232131726513
BaseRepresentation
bin11000000101001…
…001110011001010
31001011012112100200
4120011021303022
51311411112132
6104031113030
713003656231
oct3005116312
91034175320
10404004042
11198060242
12b3372776
1365913c60
143b927b18
1525704d7c
hex18149cca

404004042 has 24 divisors (see below), whose sum is σ = 942676644. Its totient is φ = 124308864.

The previous prime is 404004023. The next prime is 404004043. The reversal of 404004042 is 240400404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 315098001 + 88906041 = 17751^2 + 9429^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (404004043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 863023 + ... + 863490.

Almost surely, 2404004042 is an apocalyptic number.

404004042 is an abundant number, since it is smaller than the sum of its proper divisors (538672602).

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

404004042 is a wasteful number, since it uses less digits than its factorization.

404004042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726534 (or 1726531 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 404004042 is about 20099.8517904984. The cubic root of 404004042 is about 739.2566445636.

Adding to 404004042 its reverse (240400404), we get a palindrome (644404446).

It can be divided in two parts, 40400404 and 2, that multiplied together give a palindrome (80800808).

The spelling of 404004042 in words is "four hundred four million, four thousand, forty-two".

Divisors: 1 2 3 6 9 13 18 26 39 78 117 234 1726513 3453026 5179539 10359078 15538617 22444669 31077234 44889338 67334007 134668014 202002021 404004042