428813181 has 12 divisors (see below), whose sum is σ = 619613280. Its totient is φ = 285775560.

The previous prime is 428813171. The next prime is 428813207. The reversal of 428813181 is 181318824.

It is a de Polignac number, because none of the positive numbers 2^k-428813181 is a prime.

It is a super-2 number, since 2×428813181² = 367761488398677522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428813131) 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, 26550 + ... + 39528.

It is an arithmetic number, because the mean of its divisors is an integer number (51634440).

Almost surely, 2^428813181 is an apocalyptic number.

It is an amenable number.

428813181 is a deficient number, since it is larger than the sum of its proper divisors (190800099).

428813181 is a wasteful number, since it uses less digits than its factorization.

428813181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16656 (or 16653 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 428813181 is about 20707.8048329609. The cubic root of 428813181 is about 754.0891789676.

The spelling of 428813181 in words is "four hundred twenty-eight million, eight hundred thirteen thousand, one hundred eighty-one".