428269491 has 48 divisors (see below), whose sum is σ = 727578720. Its totient is φ = 248002560.

The previous prime is 428269483. The next prime is 428269511. The reversal of 428269491 is 194962824.

It is not a de Polignac number, because 428269491 - 2³ = 428269483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428269411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74811 + ... + 80331.

It is an arithmetic number, because the mean of its divisors is an integer number (15157890).

Almost surely, 2^428269491 is an apocalyptic number.

428269491 is a deficient number, since it is larger than the sum of its proper divisors (299309229).

428269491 is a wasteful number, since it uses less digits than its factorization.

428269491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5573 (or 5554 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 428269491 is about 20694.6730102217. The cubic root of 428269491 is about 753.7703422643.

The spelling of 428269491 in words is "four hundred twenty-eight million, two hundred sixty-nine thousand, four hundred ninety-one".