1915228 has 24 divisors (see below), whose sum is σ = 3887072. Its totient is φ = 808704.

The previous prime is 1915223. The next prime is 1915229. The reversal of 1915228 is 8225191.

1915228 is nontrivially palindromic in base 3.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1915196 and 1915205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915223) 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, 1576 + ... + 2512.

2^1915228 is an apocalyptic number.

It is an amenable number.

1915228 is an abundant number, since it is smaller than the sum of its proper divisors (1971844).

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

1915228 is a wasteful number, since it uses less digits than its factorization.

1915228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1019 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 1915228 is about 1383.9176276065. The cubic root of 1915228 is about 124.1862445794.

The spelling of 1915228 in words is "one million, nine hundred fifteen thousand, two hundred twenty-eight".