428093788 has 24 divisors (see below), whose sum is σ = 789264000. Its totient is φ = 202609008.

The previous prime is 428093777. The next prime is 428093789. The reversal of 428093788 is 887390824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428093789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157263 + ... + 159961.

It is an arithmetic number, because the mean of its divisors is an integer number (32886000).

Almost surely, 2^428093788 is an apocalyptic number.

It is an amenable number.

428093788 is a deficient number, since it is larger than the sum of its proper divisors (361170212).

428093788 is a wasteful number, since it uses less digits than its factorization.

428093788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 428093788 is about 20690.4274484603. The cubic root of 428093788 is about 753.6672468777.

The spelling of 428093788 in words is "four hundred twenty-eight million, ninety-three thousand, seven hundred eighty-eight".