538913815 has 32 divisors (see below), whose sum is σ = 768268800. Its totient is φ = 358485120.

The previous prime is 538913807. The next prime is 538913831. The reversal of 538913815 is 518319835.

It is not a de Polignac number, because 538913815 - 2³ = 538913807 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 21414 + ... + 39196.

It is an arithmetic number, because the mean of its divisors is an integer number (24008400).

Almost surely, 2^538913815 is an apocalyptic number.

538913815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

538913815 is a deficient number, since it is larger than the sum of its proper divisors (229354985).

538913815 is a wasteful number, since it uses less digits than its factorization.

538913815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17847.

The product of its digits is 129600, while the sum is 43.

The square root of 538913815 is about 23214.5173329105. The cubic root of 538913815 is about 813.7789259524.

The spelling of 538913815 in words is "five hundred thirty-eight million, nine hundred thirteen thousand, eight hundred fifteen".