428443663320 has 48 divisors (see below), whose sum is σ = 1392441906960. Its totient is φ = 114251643456.

The previous prime is 428443663283. The next prime is 428443663363. The reversal of 428443663320 is 23366344824.

It is a happy number.

428443663320 is a `hidden beast` number, since 4 + 2 + 8 + 4 + 4 + 3 + 6 + 633 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 595060284 + ... + 595061003.

It is an arithmetic number, because the mean of its divisors is an integer number (29009206395).

Almost surely, 2^428443663320 is an apocalyptic number.

428443663320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428443663320 is an abundant number, since it is smaller than the sum of its proper divisors (963998243640).

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

428443663320 is a wasteful number, since it uses less digits than its factorization.

428443663320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190121304 (or 1190121297 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 45.

The spelling of 428443663320 in words is "four hundred twenty-eight billion, four hundred forty-three million, six hundred sixty-three thousand, three hundred twenty".