919428 has 24 divisors (see below), whose sum is σ = 2272032. Its totient is φ = 288384.

The previous prime is 919427. The next prime is 919447. The reversal of 919428 is 824919.

It is not an unprimeable number, because it can be changed into a prime (919421) 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, 2050 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (94668).

2⁹¹⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

919428 is an abundant number, since it is smaller than the sum of its proper divisors (1352604).

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

919428 is a wasteful number, since it uses less digits than its factorization.

919428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531 (or 4529 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 919428 is about 958.8680826892. The cubic root of 919428 is about 97.2387218920.

The spelling of 919428 in words is "nine hundred nineteen thousand, four hundred twenty-eight".