538998555 has 16 divisors (see below), whose sum is σ = 907787520. Its totient is φ = 272335968.

The previous prime is 538998547. The next prime is 538998557. The reversal of 538998555 is 555899835.

It is not a de Polignac number, because 538998555 - 2³ = 538998547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 538998495 and 538998504.

It is not an unprimeable number, because it can be changed into a prime (538998557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 945327 + ... + 945896.

It is an arithmetic number, because the mean of its divisors is an integer number (56736720).

Almost surely, 2^538998555 is an apocalyptic number.

538998555 is a deficient number, since it is larger than the sum of its proper divisors (368788965).

538998555 is a wasteful number, since it uses less digits than its factorization.

538998555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891250.

The product of its digits is 9720000, while the sum is 57.

The square root of 538998555 is about 23216.3424121889. The cubic root of 538998555 is about 813.8215771829.

The spelling of 538998555 in words is "five hundred thirty-eight million, nine hundred ninety-eight thousand, five hundred fifty-five".