428857925 has 6 divisors (see below), whose sum is σ = 531783858. Its totient is φ = 343086320.

The previous prime is 428857921. The next prime is 428857943. The reversal of 428857925 is 529758824.

It can be written as a sum of positive squares in 3 ways, for example, as 79691329 + 349166596 = 8927^2 + 18686^2 .

It is not a de Polignac number, because 428857925 - 2² = 428857921 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428857921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8577134 + ... + 8577183.

It is an arithmetic number, because the mean of its divisors is an integer number (88630643).

Almost surely, 2^428857925 is an apocalyptic number.

It is an amenable number.

428857925 is a deficient number, since it is larger than the sum of its proper divisors (102925933).

428857925 is a wasteful number, since it uses less digits than its factorization.

428857925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17154327 (or 17154322 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The square root of 428857925 is about 20708.8851703804. The cubic root of 428857925 is about 754.1154062341.

The spelling of 428857925 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, nine hundred twenty-five".