428614693 has 16 divisors (see below), whose sum is σ = 505597680. Its totient is φ = 359525376.

The previous prime is 428614691. The next prime is 428614699. The reversal of 428614693 is 396416824.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 54656449 + 373958244 = 7393^2 + 19338^2 .

It is a cyclic number.

It is not a de Polignac number, because 428614693 - 2¹ = 428614691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428614691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27030 + ... + 39847.

It is an arithmetic number, because the mean of its divisors is an integer number (31599855).

Almost surely, 2^428614693 is an apocalyptic number.

It is an amenable number.

428614693 is a deficient number, since it is larger than the sum of its proper divisors (76982987).

428614693 is a wasteful number, since it uses less digits than its factorization.

428614693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66936.

The product of its digits is 248832, while the sum is 43.

The square root of 428614693 is about 20703.0116891239. The cubic root of 428614693 is about 753.9728106907.

The spelling of 428614693 in words is "four hundred twenty-eight million, six hundred fourteen thousand, six hundred ninety-three".