538531785 has 48 divisors (see below), whose sum is σ = 1042037568. Its totient is φ = 255024000.

The previous prime is 538531771. The next prime is 538531811. The reversal of 538531785 is 587135835.

538531785 is a `hidden beast` number, since 5 + 38 + 531 + 7 + 85 = 666.

It is not a de Polignac number, because 538531785 - 2⁵ = 538531753 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 538531785.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8635 + ... + 33935.

It is an arithmetic number, because the mean of its divisors is an integer number (21709116).

Almost surely, 2^538531785 is an apocalyptic number.

538531785 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

538531785 is a deficient number, since it is larger than the sum of its proper divisors (503505783).

538531785 is a wasteful number, since it uses less digits than its factorization.

538531785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25366 (or 25363 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 538531785 is about 23206.2876177988. The cubic root of 538531785 is about 813.5865875580.

The spelling of 538531785 in words is "five hundred thirty-eight million, five hundred thirty-one thousand, seven hundred eighty-five".