1915428 has 48 divisors (see below), whose sum is σ = 4874240. Its totient is φ = 583200.

The previous prime is 1915427. The next prime is 1915439. The reversal of 1915428 is 8245191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1915395 and 1915404.

It is not an unprimeable number, because it can be changed into a prime (1915423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6933 + ... + 7203.

2^1915428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1915428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437120).

1915428 is an abundant number, since it is smaller than the sum of its proper divisors (2958812).

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

1915428 is a wasteful number, since it uses less digits than its factorization.

1915428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 326 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 1915428 is about 1383.9898843561. The cubic root of 1915428 is about 124.1905671952.

The spelling of 1915428 in words is "one million, nine hundred fifteen thousand, four hundred twenty-eight".