428622331 has 4 divisors (see below), whose sum is σ = 428733000. Its totient is φ = 428511664.

The previous prime is 428622329. The next prime is 428622371. The reversal of 428622331 is 133226824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428622331 - 2¹ = 428622329 is a prime.

It is a super-2 number, since 2×428622331² = 367434205263747122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428622293 and 428622302.

It is not an unprimeable number, because it can be changed into a prime (428622371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49306 + ... + 57343.

It is an arithmetic number, because the mean of its divisors is an integer number (107183250).

Almost surely, 2^428622331 is an apocalyptic number.

428622331 is a deficient number, since it is larger than the sum of its proper divisors (110669).

428622331 is a wasteful number, since it uses less digits than its factorization.

428622331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110668.

The product of its digits is 13824, while the sum is 31.

The square root of 428622331 is about 20703.1961542173. The cubic root of 428622331 is about 753.9772893131.

The spelling of 428622331 in words is "four hundred twenty-eight million, six hundred twenty-two thousand, three hundred thirty-one".