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235220388 = 223131997577
BaseRepresentation
bin11100000010100…
…10110110100100
3121101121102201020
432001102312210
5440204023023
635201331140
75554224504
oct1601226644
9541542636
10235220388
11110859617
1266936ab0
1339969480
142334da04
15159b4de3
hexe052da4

235220388 has 48 divisors (see below), whose sum is σ = 594115200. Its totient is φ = 72002304.

The previous prime is 235220371. The next prime is 235220389. The reversal of 235220388 is 883022532.

It is not an unprimeable number, because it can be changed into a prime (235220389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27256 + ... + 34832.

It is an arithmetic number, because the mean of its divisors is an integer number (12377400).

Almost surely, 2235220388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 235220388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297057600).

235220388 is an abundant number, since it is smaller than the sum of its proper divisors (358894812).

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

235220388 is a wasteful number, since it uses less digits than its factorization.

235220388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7796 (or 7794 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 235220388 is about 15336.8962961872. The cubic root of 235220388 is about 617.2934290217.

The spelling of 235220388 in words is "two hundred thirty-five million, two hundred twenty thousand, three hundred eighty-eight".

Divisors: 1 2 3 4 6 12 13 26 39 52 78 156 199 398 597 796 1194 2388 2587 5174 7577 7761 10348 15154 15522 22731 30308 31044 45462 90924 98501 197002 295503 394004 591006 1182012 1507823 3015646 4523469 6031292 9046938 18093876 19601699 39203398 58805097 78406796 117610194 235220388