511578740 has 72 divisors (see below), whose sum is σ = 1137739680. Its totient is φ = 193112640.

The previous prime is 511578713. The next prime is 511578787. The reversal of 511578740 is 47875115.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 511578694 and 511578703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 826151 + ... + 826769.

It is an arithmetic number, because the mean of its divisors is an integer number (15801940).

Almost surely, 2^511578740 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 511578740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568869840).

511578740 is an abundant number, since it is smaller than the sum of its proper divisors (626160940).

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

511578740 is a wasteful number, since it uses less digits than its factorization.

511578740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 511578740 is about 22618.1064636278. The cubic root of 511578740 is about 799.7805335486.

The spelling of 511578740 in words is "five hundred eleven million, five hundred seventy-eight thousand, seven hundred forty".