538856781 has 8 divisors (see below), whose sum is σ = 719352000. Its totient is φ = 358799712.

The previous prime is 538856761. The next prime is 538856797. The reversal of 538856781 is 187658835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 538856781 - 2⁵ = 538856749 is a prime.

It is a super-2 number, since 2×538856781² = 580733260859363922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538856711) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 106656 + ... + 111593.

It is an arithmetic number, because the mean of its divisors is an integer number (89919000).

Almost surely, 2^538856781 is an apocalyptic number.

It is an amenable number.

538856781 is a deficient number, since it is larger than the sum of its proper divisors (180495219).

538856781 is a wasteful number, since it uses less digits than its factorization.

538856781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219075.

The product of its digits is 1612800, while the sum is 51.

The square root of 538856781 is about 23213.2888880486. The cubic root of 538856781 is about 813.7502171537.

The spelling of 538856781 in words is "five hundred thirty-eight million, eight hundred fifty-six thousand, seven hundred eighty-one".