511000028 has 72 divisors (see below), whose sum is σ = 1139773824. Its totient is φ = 198802800.

The previous prime is 511000019. The next prime is 511000031. The reversal of 511000028 is 820000115.

It is a super-2 number, since 2×511000028² = 522242057232001568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 739163 + ... + 739853.

It is an arithmetic number, because the mean of its divisors is an integer number (15830192).

Almost surely, 2^511000028 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 511000028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569886912).

511000028 is an abundant number, since it is smaller than the sum of its proper divisors (628773796).

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

511000028 is an equidigital number, since it uses as much as digits as its factorization.

511000028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 511000028 is about 22605.3097302382. The cubic root of 511000028 is about 799.4788418164.

The spelling of 511000028 in words is "five hundred eleven million, twenty-eight", and thus it is an aban number.