538999776 has 144 divisors (see below), whose sum is σ = 1794750048. Its totient is φ = 150220800.

The previous prime is 538999723. The next prime is 538999781. The reversal of 538999776 is 677999835.

538999776 is a `hidden beast` number, since 538 + 9 + 9 + 97 + 7 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79396 + ... + 85916.

It is an arithmetic number, because the mean of its divisors is an integer number (12463542).

Almost surely, 2^538999776 is an apocalyptic number.

538999776 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538999776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897375024).

538999776 is an abundant number, since it is smaller than the sum of its proper divisors (1255750272).

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

538999776 is a wasteful number, since it uses less digits than its factorization.

538999776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6585 (or 6574 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The square root of 538999776 is about 23216.3687083058. The cubic root of 538999776 is about 813.8221917025.

The spelling of 538999776 in words is "five hundred thirty-eight million, nine hundred ninety-nine thousand, seven hundred seventy-six".