539491978 has 8 divisors (see below), whose sum is σ = 809336772. Its totient is φ = 269713056.

The previous prime is 539491969. The next prime is 539491999. The reversal of 539491978 is 879194935.

539491978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 430853049 + 108638929 = 20757^2 + 10423^2 .

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

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, 21726 + ... + 39382.

Almost surely, 2^539491978 is an apocalyptic number.

539491978 is a deficient number, since it is larger than the sum of its proper divisors (269844794).

539491978 is a wasteful number, since it uses less digits than its factorization.

539491978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32936.

The product of its digits is 2449440, while the sum is 55.

The square root of 539491978 is about 23226.9666121084. The cubic root of 539491978 is about 814.0698374723.

The spelling of 539491978 in words is "five hundred thirty-nine million, four hundred ninety-one thousand, nine hundred seventy-eight".