428607945 has 24 divisors (see below), whose sum is σ = 743593032. Its totient is φ = 228384000.

The previous prime is 428607941. The next prime is 428607997. The reversal of 428607945 is 549706824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76370121 + 352237824 = 8739^2 + 18768^2 .

It is not a de Polignac number, because 428607945 - 2² = 428607941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 428607945.

It is not an unprimeable number, because it can be changed into a prime (428607941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54885 + ... + 62205.

It is an arithmetic number, because the mean of its divisors is an integer number (30983043).

Almost surely, 2^428607945 is an apocalyptic number.

428607945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

428607945 is a deficient number, since it is larger than the sum of its proper divisors (314985087).

428607945 is a wasteful number, since it uses less digits than its factorization.

428607945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633 (or 8630 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 428607945 is about 20702.8487170244. The cubic root of 428607945 is about 753.9688538849.

It can be divided in two parts, 42860 and 7945, that added together give a palindrome (50805).

The spelling of 428607945 in words is "four hundred twenty-eight million, six hundred seven thousand, nine hundred forty-five".