428076099 has 72 divisors (see below), whose sum is σ = 758131920. Its totient is φ = 231137280.

The previous prime is 428076083. The next prime is 428076107. The reversal of 428076099 is 990670824.

It is a happy number.

It is a Cunningham number, because it is equal to 20690²-1.

It is not a de Polignac number, because 428076099 - 2⁴ = 428076083 is a prime.

It is a super-3 number, since 3×428076099³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428076029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 351139 + ... + 352355.

It is an arithmetic number, because the mean of its divisors is an integer number (10529610).

Almost surely, 2^428076099 is an apocalyptic number.

428076099 is a deficient number, since it is larger than the sum of its proper divisors (330055821).

428076099 is a wasteful number, since it uses less digits than its factorization.

428076099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 428076099 is about 20689.9999758337. Note that the first 4 decimals coincide. The cubic root of 428076099 is about 753.6568661278.

The spelling of 428076099 in words is "four hundred twenty-eight million, seventy-six thousand, ninety-nine".