428229625 has 16 divisors (see below), whose sum is σ = 547472016. Its totient is φ = 334224000.

The previous prime is 428229563. The next prime is 428229653. The reversal of 428229625 is 526922824.

It can be written as a sum of positive squares in 8 ways, for example, as 104121616 + 324108009 = 10204^2 + 18003^2 .

It is not a de Polignac number, because 428229625 - 2²³ = 419841017 is a prime.

It is a super-2 number, since 2×428229625² = 366761223455281250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36654 + ... + 46903.

It is an arithmetic number, because the mean of its divisors is an integer number (34217001).

Almost surely, 2^428229625 is an apocalyptic number.

It is an amenable number.

428229625 is a deficient number, since it is larger than the sum of its proper divisors (119242391).

428229625 is an equidigital number, since it uses as much as digits as its factorization.

428229625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83613 (or 83603 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 428229625 is about 20693.7097930748. The cubic root of 428229625 is about 753.7469529876.

The spelling of 428229625 in words is "four hundred twenty-eight million, two hundred twenty-nine thousand, six hundred twenty-five".