428886720 has 168 divisors, whose sum is σ = 1487326464. Its totient is φ = 113430528.

The previous prime is 428886707. The next prime is 428886739. The reversal of 428886720 is 27688824.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 394017 + ... + 395103.

Almost surely, 2^428886720 is an apocalyptic number.

428886720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428886720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743663232).

428886720 is an abundant number, since it is smaller than the sum of its proper divisors (1058439744).

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

428886720 is a wasteful number, since it uses less digits than its factorization.

428886720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 428886720 is about 20709.5803916931. The cubic root of 428886720 is about 754.1322838260.

The spelling of 428886720 in words is "four hundred twenty-eight million, eight hundred eighty-six thousand, seven hundred twenty".