511220468 has 24 divisors (see below), whose sum is σ = 1009622880. Its totient is φ = 224359520.

The previous prime is 511220467. The next prime is 511220491. The reversal of 511220468 is 864022115.

It is a super-2 number, since 2×511220468² = 522692733804278048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 511220468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511220467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199046 + ... + 201597.

It is an arithmetic number, because the mean of its divisors is an integer number (42067620).

Almost surely, 2^511220468 is an apocalyptic number.

511220468 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

511220468 is a deficient number, since it is larger than the sum of its proper divisors (498402412).

511220468 is a wasteful number, since it uses less digits than its factorization.

511220468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400687 (or 400685 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 511220468 is about 22610.1850501052. The cubic root of 511220468 is about 799.5937875242.

The spelling of 511220468 in words is "five hundred eleven million, two hundred twenty thousand, four hundred sixty-eight".