[go: up one dir, main page]

Search a number
-
+
405223252 = 22719977247
BaseRepresentation
bin11000001001110…
…011011101010100
31001020111110210121
4120021303131110
51312214121002
6104113201324
713020224620
oct3011633524
91036443717
10405223252
11198813255
12b3860244
1365c4cb95
143bb64180
1525896237
hex18273754

405223252 has 24 divisors (see below), whose sum is σ = 810964224. Its totient is φ = 173556192.

The previous prime is 405223229. The next prime is 405223253. The reversal of 405223252 is 252322504.

It is a happy number.

It is a super-2 number, since 2×4052232522 = 328411767922911008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405223253) 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, 52293 + ... + 59539.

It is an arithmetic number, because the mean of its divisors is an integer number (33790176).

Almost surely, 2405223252 is an apocalyptic number.

It is an amenable number.

405223252 is an abundant number, since it is smaller than the sum of its proper divisors (405740972).

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

405223252 is a wasteful number, since it uses less digits than its factorization.

405223252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9255 (or 9253 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 405223252 is about 20130.1577738477. The cubic root of 405223252 is about 739.9995446795. Note that the first 3 decimals are identical.

Adding to 405223252 its reverse (252322504), we get a palindrome (657545756).

The spelling of 405223252 in words is "four hundred five million, two hundred twenty-three thousand, two hundred fifty-two".

Divisors: 1 2 4 7 14 28 1997 3994 7247 7988 13979 14494 27958 28988 50729 55916 101458 202916 14472259 28944518 57889036 101305813 202611626 405223252