428933680 has 40 divisors (see below), whose sum is σ = 1139739552. Its totient is φ = 147062784.

The previous prime is 428933621. The next prime is 428933699. The reversal of 428933680 is 86339824.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382417 + ... + 383536.

Almost surely, 2^428933680 is an apocalyptic number.

428933680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428933680 is an abundant number, since it is smaller than the sum of its proper divisors (710805872).

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

428933680 is a wasteful number, since it uses less digits than its factorization.

428933680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765973 (or 765967 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 428933680 is about 20710.7141354421. The cubic root of 428933680 is about 754.1598068354.

The spelling of 428933680 in words is "four hundred twenty-eight million, nine hundred thirty-three thousand, six hundred eighty".