1898424 has 128 divisors (see below), whose sum is σ = 6220800. Its totient is φ = 529920.

The previous prime is 1898419. The next prime is 1898431. The reversal of 1898424 is 4248981.

1898424 is nontrivially palindromic in base 5.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40369 + ... + 40415.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2^1898424 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 1898424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110400).

1898424 is an abundant number, since it is smaller than the sum of its proper divisors (4322376).

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

1898424 is a wasteful number, since it uses less digits than its factorization.

1898424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 80 counting only the distinct ones).

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

The square root of 1898424 is about 1377.8330813273. The cubic root of 1898424 is about 123.8219783282.

The spelling of 1898424 in words is "one million, eight hundred ninety-eight thousand, four hundred twenty-four".