428978165 has 64 divisors (see below), whose sum is σ = 663994368. Its totient is φ = 258336000.

The previous prime is 428978159. The next prime is 428978167. The reversal of 428978165 is 561879824.

It is not a de Polignac number, because 428978165 - 2⁶ = 428978101 is a prime.

It is a Duffinian number.

Its product of digits (967680) is a multiple of the sum of its prime divisors (378).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428978167) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2732267 + ... + 2732423.

It is an arithmetic number, because the mean of its divisors is an integer number (10374912).

Almost surely, 2^428978165 is an apocalyptic number.

It is an amenable number.

428978165 is a deficient number, since it is larger than the sum of its proper divisors (235016203).

428978165 is a wasteful number, since it uses less digits than its factorization.

428978165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378.

The product of its digits is 967680, while the sum is 50.

The square root of 428978165 is about 20711.7880686338. The cubic root of 428978165 is about 754.1858774075.

The spelling of 428978165 in words is "four hundred twenty-eight million, nine hundred seventy-eight thousand, one hundred sixty-five".