511085388 has 48 divisors (see below), whose sum is σ = 1302537600. Its totient is φ = 154684800.

The previous prime is 511085383. The next prime is 511085417. The reversal of 511085388 is 883580115.

It is a super-2 number, since 2×511085388² = 522416547654221088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511085381) 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, 136623 + ... + 140313.

It is an arithmetic number, because the mean of its divisors is an integer number (27136200).

Almost surely, 2^511085388 is an apocalyptic number.

It is an amenable number.

511085388 is an abundant number, since it is smaller than the sum of its proper divisors (791452212).

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

511085388 is a wasteful number, since it uses less digits than its factorization.

511085388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758 (or 4756 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 39.

The square root of 511085388 is about 22607.1977033864. The cubic root of 511085388 is about 799.5233556524.

The spelling of 511085388 in words is "five hundred eleven million, eighty-five thousand, three hundred eighty-eight".