428113609 has 12 divisors (see below), whose sum is σ = 537796672. Its totient is φ = 333594360.

The previous prime is 428113607. The next prime is 428113613. The reversal of 428113609 is 906311824.

It is not a de Polignac number, because 428113609 - 2¹ = 428113607 is a prime.

It is a super-2 number, since 2×428113609² = 366562524422009762, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (428113607) 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, 251877 + ... + 253570.

Almost surely, 2^428113609 is an apocalyptic number.

It is an amenable number.

428113609 is a deficient number, since it is larger than the sum of its proper divisors (109683063).

428113609 is a wasteful number, since it uses less digits than its factorization.

428113609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505476 (or 505465 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 428113609 is about 20690.9064325370. The cubic root of 428113609 is about 753.6788784472.

The spelling of 428113609 in words is "four hundred twenty-eight million, one hundred thirteen thousand, six hundred nine".