511535420 has 48 divisors (see below), whose sum is σ = 1177158528. Its totient is φ = 185175360.

The previous prime is 511535413. The next prime is 511535449. The reversal of 511535420 is 24535115.

It is a self number, because there is not a number n which added to its sum of digits gives 511535420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44819 + ... + 55061.

It is an arithmetic number, because the mean of its divisors is an integer number (24524136).

Almost surely, 2^511535420 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 511535420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (588579264).

511535420 is an abundant number, since it is smaller than the sum of its proper divisors (665623108).

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

511535420 is a wasteful number, since it uses less digits than its factorization.

511535420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490 (or 10488 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 511535420 is about 22617.1488035075. The cubic root of 511535420 is about 799.7579580270.

The spelling of 511535420 in words is "five hundred eleven million, five hundred thirty-five thousand, four hundred twenty".