428091000 has 64 divisors (see below), whose sum is σ = 1335653280. Its totient is φ = 114156800.

The previous prime is 428090959. The next prime is 428091029. The reversal of 428091000 is 190824.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68349 + ... + 74348.

Almost surely, 2^428091000 is an apocalyptic number.

428091000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428091000 is an abundant number, since it is smaller than the sum of its proper divisors (907562280).

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

428091000 is a wasteful number, since it uses less digits than its factorization.

428091000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142721 (or 142707 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 428091000 is about 20690.3600741988. The cubic root of 428091000 is about 753.6656107651.

The spelling of 428091000 in words is "four hundred twenty-eight million, ninety-one thousand".