428751408 has 20 divisors (see below), whose sum is σ = 1107607928. Its totient is φ = 142917120.

The previous prime is 428751377. The next prime is 428751431. The reversal of 428751408 is 804157824.

It is a happy number.

It is a super-3 number, since 3×428751408³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4466113 + ... + 4466208.

Almost surely, 2^428751408 is an apocalyptic number.

428751408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

428751408 is an abundant number, since it is smaller than the sum of its proper divisors (678856520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428751408 is a wasteful number, since it uses less digits than its factorization.

428751408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932332 (or 8932326 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 428751408 is about 20706.3132401690. The cubic root of 428751408 is about 754.0529669372.

The spelling of 428751408 in words is "four hundred twenty-eight million, seven hundred fifty-one thousand, four hundred eight".