538021918 has 8 divisors (see below), whose sum is σ = 922323312. Its totient is φ = 230580816.

The previous prime is 538021889. The next prime is 538021927. The reversal of 538021918 is 819120835.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19215055 + ... + 19215082.

It is an arithmetic number, because the mean of its divisors is an integer number (115290414).

Almost surely, 2^538021918 is an apocalyptic number.

538021918 is a deficient number, since it is larger than the sum of its proper divisors (384301394).

538021918 is a wasteful number, since it uses less digits than its factorization.

538021918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38430146.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 538021918 is about 23195.2994807138. The cubic root of 538021918 is about 813.3297460575.

The spelling of 538021918 in words is "five hundred thirty-eight million, twenty-one thousand, nine hundred eighteen".