428839385 has 16 divisors (see below), whose sum is σ = 573305040. Its totient is φ = 305760000.

The previous prime is 428839351. The next prime is 428839409. The reversal of 428839385 is 583938824.

It can be written as a sum of positive squares in 8 ways, for example, as 114982729 + 313856656 = 10723^2 + 17716^2 .

It is not a de Polignac number, because 428839385 - 2¹⁴ = 428823001 is a prime.

It is a Curzon number.

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, 111866 + ... + 115635.

It is an arithmetic number, because the mean of its divisors is an integer number (35831565).

Almost surely, 2^428839385 is an apocalyptic number.

It is an amenable number.

428839385 is a deficient number, since it is larger than the sum of its proper divisors (144465655).

428839385 is a wasteful number, since it uses less digits than its factorization.

428839385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227548.

The product of its digits is 1658880, while the sum is 50.

The square root of 428839385 is about 20708.4375315957. The cubic root of 428839385 is about 754.1045389979.

The spelling of 428839385 in words is "four hundred twenty-eight million, eight hundred thirty-nine thousand, three hundred eighty-five".