538734861 has 24 divisors (see below), whose sum is σ = 928434240. Its totient is φ = 307847736.

The previous prime is 538734857. The next prime is 538734863. The reversal of 538734861 is 168437835.

538734861 is a `hidden beast` number, since 538 + 7 + 34 + 86 + 1 = 666.

It is not a de Polignac number, because 538734861 - 2² = 538734857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538734863) by changing a digit.

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, 202281 + ... + 204926.

It is an arithmetic number, because the mean of its divisors is an integer number (38684760).

Almost surely, 2^538734861 is an apocalyptic number.

It is an amenable number.

538734861 is a deficient number, since it is larger than the sum of its proper divisors (389699379).

538734861 is a wasteful number, since it uses less digits than its factorization.

538734861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407230 (or 407217 counting only the distinct ones).

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

The square root of 538734861 is about 23210.6626574943. The cubic root of 538734861 is about 813.6888403567.

The spelling of 538734861 in words is "five hundred thirty-eight million, seven hundred thirty-four thousand, eight hundred sixty-one".