538021738 has 8 divisors (see below), whose sum is σ = 807682500. Its totient is φ = 268794240.

The previous prime is 538021733. The next prime is 538021747. The reversal of 538021738 is 837120835.

It can be written as a sum of positive squares in 2 ways, for example, as 511981129 + 26040609 = 22627^2 + 5103^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 538021697 and 538021706.

It is not an unprimeable number, because it can be changed into a prime (538021733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105193 + ... + 110188.

Almost surely, 2^538021738 is an apocalyptic number.

538021738 is a deficient number, since it is larger than the sum of its proper divisors (269660762).

538021738 is a wasteful number, since it uses less digits than its factorization.

538021738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216632.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 538021738 is about 23195.2956006169. The cubic root of 538021738 is about 813.3296553553.

The spelling of 538021738 in words is "five hundred thirty-eight million, twenty-one thousand, seven hundred thirty-eight".