538720385 has 32 divisors (see below), whose sum is σ = 771863040. Its totient is φ = 353138688.

The previous prime is 538720373. The next prime is 538720393. The reversal of 538720385 is 583027835.

It is not a de Polignac number, because 538720385 - 2¹² = 538716289 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101969 + ... + 107121.

It is an arithmetic number, because the mean of its divisors is an integer number (24120720).

Almost surely, 2^538720385 is an apocalyptic number.

It is an amenable number.

538720385 is a deficient number, since it is larger than the sum of its proper divisors (233142655).

538720385 is a wasteful number, since it uses less digits than its factorization.

538720385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 538720385 is about 23210.3508159614. The cubic root of 538720385 is about 813.6815522539.

The spelling of 538720385 in words is "five hundred thirty-eight million, seven hundred twenty thousand, three hundred eighty-five".