428655672 has 64 divisors (see below), whose sum is σ = 1192665600. Its totient is φ = 142650720.

The previous prime is 428655593. The next prime is 428655673. The reversal of 428655672 is 276556824.

428655672 is a `hidden beast` number, since 4 + 2 + 86 + 5 + 567 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428655673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173953 + ... + 176399.

It is an arithmetic number, because the mean of its divisors is an integer number (18635400).

Almost surely, 2^428655672 is an apocalyptic number.

It is an amenable number.

428655672 is an abundant number, since it is smaller than the sum of its proper divisors (764009928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428655672 is a wasteful number, since it uses less digits than its factorization.

428655672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273 (or 3263 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 428655672 is about 20704.0013523956. The cubic root of 428655672 is about 753.9968385395.

It can be divided in two parts, 428 and 655672, that added together give a square (656100 = 810²).

The spelling of 428655672 in words is "four hundred twenty-eight million, six hundred fifty-five thousand, six hundred seventy-two".