428622181 has 8 divisors (see below), whose sum is σ = 481662720. Its totient is φ = 378448752.

The previous prime is 428622169. The next prime is 428622199. The reversal of 428622181 is 181226824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428622181 - 2⁵ = 428622149 is a prime.

It is a super-2 number, since 2×428622181² = 367433948090393522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428622781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716461 + ... + 717058.

It is an arithmetic number, because the mean of its divisors is an integer number (60207840).

Almost surely, 2^428622181 is an apocalyptic number.

It is an amenable number.

428622181 is a deficient number, since it is larger than the sum of its proper divisors (53040539).

428622181 is a wasteful number, since it uses less digits than its factorization.

428622181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433555.

The product of its digits is 12288, while the sum is 34.

The square root of 428622181 is about 20703.1925315880. The cubic root of 428622181 is about 753.9772013595.

The spelling of 428622181 in words is "four hundred twenty-eight million, six hundred twenty-two thousand, one hundred eighty-one".