538686720 has 576 divisors, whose sum is σ = 2266387200. Its totient is φ = 119439360.

The previous prime is 538686691. The next prime is 538686751. The reversal of 538686720 is 27686835.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4942026 + ... + 4942134.

It is an arithmetic number, because the mean of its divisors is an integer number (3934700).

Almost surely, 2^538686720 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 538686720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133193600).

538686720 is an abundant number, since it is smaller than the sum of its proper divisors (1727700480).

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

538686720 is a wasteful number, since it uses less digits than its factorization.

538686720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 538686720 is about 23209.6255893972. The cubic root of 538686720 is about 813.6646027312.

The spelling of 538686720 in words is "five hundred thirty-eight million, six hundred eighty-six thousand, seven hundred twenty".