Base | Representation |
---|---|
bin | 101100010010… |
… | …0111101101000 |
3 | 1121200200221200 |
4 | 1120210331220 |
5 | 21421020242 |
6 | 2145404200 |
7 | 401240001 |
oct | 130447550 |
9 | 47620850 |
10 | 23220072 |
11 | 1211a647 |
12 | 7939660 |
13 | 4a6ccb5 |
14 | 31261a8 |
15 | 208a04c |
hex | 1624f68 |
23220072 has 24 divisors (see below), whose sum is σ = 62887890. Its totient is φ = 7740000.
The previous prime is 23220049. The next prime is 23220073. The reversal of 23220072 is 27002232.
It can be written as a sum of positive squares in only one way, i.e., 22524516 + 695556 = 4746^2 + 834^2 .
It is a tau number, because it is divible by the number of its divisors (24).
It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.
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 (23220073) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161179 + ... + 161322.
Almost surely, 223220072 is an apocalyptic number.
It is an amenable number.
23220072 is an abundant number, since it is smaller than the sum of its proper divisors (39667818).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23220072 is a wasteful number, since it uses less digits than its factorization.
23220072 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 322513 (or 322506 counting only the distinct ones).
The product of its (nonzero) digits is 336, while the sum is 18.
The square root of 23220072 is about 4818.7209921306. The cubic root of 23220072 is about 285.2908572654.
The spelling of 23220072 in words is "twenty-three million, two hundred twenty thousand, seventy-two".
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