428449825 has 12 divisors (see below), whose sum is σ = 545637820. Its totient is φ = 333495360.

The previous prime is 428449823. The next prime is 428449841. The reversal of 428449825 is 528944824.

It can be written as a sum of positive squares in 6 ways, for example, as 4460544 + 423989281 = 2112^2 + 20591^2 .

It is not a de Polignac number, because 428449825 - 2¹ = 428449823 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (428449823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230670 + ... + 232519.

Almost surely, 2^428449825 is an apocalyptic number.

It is an amenable number.

428449825 is a deficient number, since it is larger than the sum of its proper divisors (117187995).

428449825 is a wasteful number, since it uses less digits than its factorization.

428449825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463236 (or 463231 counting only the distinct ones).

The product of its digits is 737280, while the sum is 46.

The square root of 428449825 is about 20699.0295666246. The cubic root of 428449825 is about 753.8761256158.

The spelling of 428449825 in words is "four hundred twenty-eight million, four hundred forty-nine thousand, eight hundred twenty-five".