428613669 has 24 divisors (see below), whose sum is σ = 677611584. Its totient is φ = 258912000.

The previous prime is 428613643. The next prime is 428613677. The reversal of 428613669 is 966316824.

428613669 is a `hidden beast` number, since 4 + 28 + 613 + 6 + 6 + 9 = 666.

It is not a de Polignac number, because 428613669 - 2⁷ = 428613541 is a prime.

It is a super-2 number, since 2×428613669² = 367419354507283122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428613629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23829 + ... + 37749.

It is an arithmetic number, because the mean of its divisors is an integer number (28233816).

Almost surely, 2^428613669 is an apocalyptic number.

It is an amenable number.

428613669 is a deficient number, since it is larger than the sum of its proper divisors (248997915).

428613669 is a wasteful number, since it uses less digits than its factorization.

428613669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14249 (or 14246 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 428613669 is about 20702.9869584077. The cubic root of 428613669 is about 753.9722102533.

It can be divided in two parts, 4286 and 13669, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 428613669 in words is "four hundred twenty-eight million, six hundred thirteen thousand, six hundred sixty-nine".