428821445 has 32 divisors (see below), whose sum is σ = 564345600. Its totient is φ = 312766272.

The previous prime is 428821441. The next prime is 428821483. The reversal of 428821445 is 544128824.

It is not a de Polignac number, because 428821445 - 2² = 428821441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428821399 and 428821408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428821441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1131266 + ... + 1131644.

It is an arithmetic number, because the mean of its divisors is an integer number (17635800).

Almost surely, 2^428821445 is an apocalyptic number.

It is an amenable number.

428821445 is a deficient number, since it is larger than the sum of its proper divisors (135524155).

428821445 is a wasteful number, since it uses less digits than its factorization.

428821445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 500 counting only the distinct ones).

The product of its digits is 81920, while the sum is 38.

The square root of 428821445 is about 20708.0043702912. The cubic root of 428821445 is about 754.0940231540.

The spelling of 428821445 in words is "four hundred twenty-eight million, eight hundred twenty-one thousand, four hundred forty-five".