1894428 has 36 divisors (see below), whose sum is σ = 4968600. Its totient is φ = 631152.

The previous prime is 1894411. The next prime is 1894439. The reversal of 1894428 is 8244981.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1894392 and 1894401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3 + ... + 1946.

2^1894428 is an apocalyptic number.

1894428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1894428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2484300).

1894428 is an abundant number, since it is smaller than the sum of its proper divisors (3074172).

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

1894428 is a wasteful number, since it uses less digits than its factorization.

1894428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1954 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1894428 is about 1376.3822143576. The cubic root of 1894428 is about 123.7350395138.

The spelling of 1894428 in words is "one million, eight hundred ninety-four thousand, four hundred twenty-eight".