520428403 has 16 divisors (see below), whose sum is σ = 606274560. Its totient is φ = 442058400.

The previous prime is 520428397. The next prime is 520428407. The reversal of 520428403 is 304824025.

It is a cyclic number.

It is not a de Polignac number, because 520428403 - 2⁹ = 520427891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520428407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16425 + ... + 36202.

It is an arithmetic number, because the mean of its divisors is an integer number (37892160).

Almost surely, 2^520428403 is an apocalyptic number.

520428403 is a deficient number, since it is larger than the sum of its proper divisors (85846157).

520428403 is a wasteful number, since it uses less digits than its factorization.

520428403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52698.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 520428403 is about 22812.8999252616. The cubic root of 520428403 is about 804.3659232778.

The spelling of 520428403 in words is "five hundred twenty million, four hundred twenty-eight thousand, four hundred three".