428001499 has 4 divisors (see below), whose sum is σ = 428663664. Its totient is φ = 427339336.

The previous prime is 428001493. The next prime is 428001523. The reversal of 428001499 is 994100824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428001499 - 2³ = 428001491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428001491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330112 + ... + 331405.

It is an arithmetic number, because the mean of its divisors is an integer number (107165916).

Almost surely, 2^428001499 is an apocalyptic number.

428001499 is a deficient number, since it is larger than the sum of its proper divisors (662165).

428001499 is an equidigital number, since it uses as much as digits as its factorization.

428001499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662164.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 428001499 is about 20688.1970939954. The cubic root of 428001499 is about 753.6130841394.

The spelling of 428001499 in words is "four hundred twenty-eight million, one thousand, four hundred ninety-nine".