428809401 has 12 divisors (see below), whose sum is σ = 646321728. Its totient is φ = 273443544.

The previous prime is 428809397. The next prime is 428809417. The reversal of 428809401 is 104908824.

It is not a de Polignac number, because 428809401 - 2² = 428809397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428809421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1035565 + ... + 1035978.

It is an arithmetic number, because the mean of its divisors is an integer number (53860144).

Almost surely, 2^428809401 is an apocalyptic number.

It is an amenable number.

428809401 is a deficient number, since it is larger than the sum of its proper divisors (217512327).

428809401 is a wasteful number, since it uses less digits than its factorization.

428809401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071572 (or 2071569 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 428809401 is about 20707.7135628248. The cubic root of 428809401 is about 754.0869631888.

The spelling of 428809401 in words is "four hundred twenty-eight million, eight hundred nine thousand, four hundred one".