1897428 has 24 divisors (see below), whose sum is σ = 4768288. Its totient is φ = 583776.

The previous prime is 1897409. The next prime is 1897429. The reversal of 1897428 is 8247981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5926 + ... + 6237.

2^1897428 is an apocalyptic number.

It is an amenable number.

1897428 is an abundant number, since it is smaller than the sum of its proper divisors (2870860).

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

1897428 is a wasteful number, since it uses less digits than its factorization.

1897428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12183 (or 12181 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 1897428 is about 1377.4715968034. The cubic root of 1897428 is about 123.8003203171.

The spelling of 1897428 in words is "one million, eight hundred ninety-seven thousand, four hundred twenty-eight".