520890418 has 4 divisors (see below), whose sum is σ = 781335630. Its totient is φ = 260445208.

The previous prime is 520890367. The next prime is 520890449. The reversal of 520890418 is 814098025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 520889329 + 1089 = 22823^2 + 33^2 .

It is a super-4 number, since 4×520890418⁴ (a number of 36 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130222603 + ... + 130222606.

Almost surely, 2^520890418 is an apocalyptic number.

520890418 is a deficient number, since it is larger than the sum of its proper divisors (260445212).

520890418 is a wasteful number, since it uses less digits than its factorization.

520890418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260445211.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 520890418 is about 22823.0238574997. The cubic root of 520890418 is about 804.6038805720.

The spelling of 520890418 in words is "five hundred twenty million, eight hundred ninety thousand, four hundred eighteen".