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400469 = 1723557
BaseRepresentation
bin1100001110001010101
3202100100012
41201301111
5100303334
612330005
73255356
oct1416125
9670305
10400469
11253973
12173905
13110384
14a5d2d
157d9ce
hex61c55

400469 has 4 divisors (see below), whose sum is σ = 424044. Its totient is φ = 376896.

The previous prime is 400457. The next prime is 400471. The reversal of 400469 is 964004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114244 + 286225 = 338^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 400469 - 212 = 396373 is a prime.

It is a super-2 number, since 2×4004692 = 320750839922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11762 + ... + 11795.

It is an arithmetic number, because the mean of its divisors is an integer number (106011).

2400469 is an apocalyptic number.

It is an amenable number.

400469 is a deficient number, since it is larger than the sum of its proper divisors (23575).

400469 is a wasteful number, since it uses less digits than its factorization.

400469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23574.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 400469 is about 632.8262004690. The cubic root of 400469 is about 73.7094155716.

The spelling of 400469 in words is "four hundred thousand, four hundred sixty-nine".

Divisors: 1 17 23557 400469