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3000020 = 225150001
BaseRepresentation
bin1011011100011011010100
312122102020212
423130123110
51232000040
6144144552
734333262
oct13343324
95572225
103000020
111769a61
121008158
1381067a
14581432
153e3d65
hex2dc6d4

3000020 has 12 divisors (see below), whose sum is σ = 6300084. Its totient is φ = 1200000.

The previous prime is 3000017. The next prime is 3000029. The reversal of 3000020 is 200003.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1056784 + 1943236 = 1028^2 + 1394^2 .

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a junction number, because it is equal to n+sod(n) for n = 2999968 and 3000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3000029) 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, 74981 + ... + 75020.

It is an arithmetic number, because the mean of its divisors is an integer number (525007).

Almost surely, 23000020 is an apocalyptic number.

It is an amenable number.

3000020 is an abundant number, since it is smaller than the sum of its proper divisors (3300064).

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

3000020 is a wasteful number, since it uses less digits than its factorization.

3000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150010 (or 150008 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 5.

The square root of 3000020 is about 1732.0565810619. The cubic root of 3000020 is about 144.2252775299.

Adding to 3000020 its reverse (200003), we get a palindrome (3200023).

The spelling of 3000020 in words is "three million, twenty", and thus it is an aban number and an uban number.

Divisors: 1 2 4 5 10 20 150001 300002 600004 750005 1500010 3000020