428499 has 12 divisors (see below), whose sum is σ = 632736. Its totient is φ = 279312.

The previous prime is 428489. The next prime is 428503. The reversal of 428499 is 994824.

It is a happy number.

It is not a de Polignac number, because 428499 - 2¹³ = 420307 is a prime.

It is a super-2 number, since 2×428499² = 367222786002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84 + ... + 929.

It is an arithmetic number, because the mean of its divisors is an integer number (52728).

2⁴²⁸⁴⁹⁹ is an apocalyptic number.

428499 is a deficient number, since it is larger than the sum of its proper divisors (204237).

428499 is a wasteful number, since it uses less digits than its factorization.

428499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1063 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 428499 is about 654.5983501354. The cubic root of 428499 is about 75.3904966364.

It can be divided in two parts, 42849 and 9, that multiplied together give a square (385641 = 621²).

The spelling of 428499 in words is "four hundred twenty-eight thousand, four hundred ninety-nine".