520346642 has 16 divisors (see below), whose sum is σ = 827026200. Its totient is φ = 244693248.

The previous prime is 520346609. The next prime is 520346663. The reversal of 520346642 is 246643025.

It can be written as a sum of positive squares in 4 ways, for example, as 460917961 + 59428681 = 21469^2 + 7709^2 .

It is a junction number, because it is equal to n+sod(n) for n = 520346599 and 520346608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50984 + ... + 60332.

Almost surely, 2^520346642 is an apocalyptic number.

520346642 is a deficient number, since it is larger than the sum of its proper divisors (306679558).

520346642 is a wasteful number, since it uses less digits than its factorization.

520346642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 520346642 is about 22811.1078643717. The cubic root of 520346642 is about 804.3237982348.

Adding to 520346642 its reverse (246643025), we get a palindrome (766989667).

The spelling of 520346642 in words is "five hundred twenty million, three hundred forty-six thousand, six hundred forty-two".