Search a number
-
+
512540812 = 22718305029
BaseRepresentation
bin11110100011001…
…100000010001100
31022201102202211001
4132203030002030
52022202301222
6122505310044
715462345040
oct3643140214
91281382731
10512540812
11243352553
12123795324
13822562b4
144c0dc020
152eee3e27
hex1e8cc08c

512540812 has 12 divisors (see below), whose sum is σ = 1025081680. Its totient is φ = 219660336.

The previous prime is 512540797. The next prime is 512540813. The reversal of 512540812 is 218045215.

512540812 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 18305029 = 512540812 / (5 + 1 + 2 + 5 + 4 + 0 + 8 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (512540813) 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, 9152487 + ... + 9152542.

Almost surely, 2512540812 is an apocalyptic number.

It is an amenable number.

512540812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

512540812 is a wasteful number, since it uses less digits than its factorization.

512540812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305040 (or 18305038 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 512540812 is about 22639.3642136876. The cubic root of 512540812 is about 800.2815738003.

The spelling of 512540812 in words is "five hundred twelve million, five hundred forty thousand, eight hundred twelve".

Divisors: 1 2 4 7 14 28 18305029 36610058 73220116 128135203 256270406 512540812