511806340 has 48 divisors (see below), whose sum is σ = 1098195840. Its totient is φ = 200309760.

The previous prime is 511806329. The next prime is 511806343. The reversal of 511806340 is 43608115.

It is a junction number, because it is equal to n+sod(n) for n = 511806299 and 511806308.

It is not an unprimeable number, because it can be changed into a prime (511806343) 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, 196084 + ... + 198676.

It is an arithmetic number, because the mean of its divisors is an integer number (22879080).

Almost surely, 2^511806340 is an apocalyptic number.

It is an amenable number.

511806340 is an abundant number, since it is smaller than the sum of its proper divisors (586389500).

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

511806340 is a wasteful number, since it uses less digits than its factorization.

511806340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2810 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 511806340 is about 22623.1372713866. The cubic root of 511806340 is about 799.8991226969.

The spelling of 511806340 in words is "five hundred eleven million, eight hundred six thousand, three hundred forty".