428501493 has 48 divisors (see below), whose sum is σ = 727474176. Its totient is φ = 237958560.

The previous prime is 428501467. The next prime is 428501503. The reversal of 428501493 is 394105824.

It is not a de Polignac number, because 428501493 - 2⁵ = 428501461 is a prime.

It is a super-2 number, since 2×428501493² = 367227059006458098, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428501093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 993988 + ... + 994418.

It is an arithmetic number, because the mean of its divisors is an integer number (15155712).

Almost surely, 2^428501493 is an apocalyptic number.

428501493 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

428501493 is a deficient number, since it is larger than the sum of its proper divisors (298972683).

428501493 is a wasteful number, since it uses less digits than its factorization.

428501493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 428501493 is about 20700.2776068342. The cubic root of 428501493 is about 753.9064284298.

The spelling of 428501493 in words is "four hundred twenty-eight million, five hundred one thousand, four hundred ninety-three".