428599691 has 8 divisors (see below), whose sum is σ = 472827264. Its totient is φ = 385980480.

The previous prime is 428599679. The next prime is 428599697. The reversal of 428599691 is 196995824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428599691 - 2¹⁴ = 428583307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428599697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401531 + ... + 402596.

It is an arithmetic number, because the mean of its divisors is an integer number (59103408).

Almost surely, 2^428599691 is an apocalyptic number.

428599691 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

428599691 is a deficient number, since it is larger than the sum of its proper divisors (44227573).

428599691 is a wasteful number, since it uses less digits than its factorization.

428599691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804181.

The product of its digits is 1399680, while the sum is 53.

The square root of 428599691 is about 20702.6493715176. The cubic root of 428599691 is about 753.9640139537.

The spelling of 428599691 in words is "four hundred twenty-eight million, five hundred ninety-nine thousand, six hundred ninety-one".