428616403 has 4 divisors (see below), whose sum is σ = 428694048. Its totient is φ = 428538760.

The previous prime is 428616401. The next prime is 428616407. The reversal of 428616403 is 304616824.

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

It is a cyclic number.

It is not a de Polignac number, because 428616403 - 2¹ = 428616401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428616401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29851 + ... + 41812.

It is an arithmetic number, because the mean of its divisors is an integer number (107173512).

Almost surely, 2^428616403 is an apocalyptic number.

428616403 is a deficient number, since it is larger than the sum of its proper divisors (77645).

428616403 is an equidigital number, since it uses as much as digits as its factorization.

428616403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77644.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 428616403 is about 20703.0529874219. The cubic root of 428616403 is about 753.9738133719.

The spelling of 428616403 in words is "four hundred twenty-eight million, six hundred sixteen thousand, four hundred three".