1898240 has 36 divisors (see below), whose sum is σ = 4549944. Its totient is φ = 758784.

The previous prime is 1898227. The next prime is 1898243. The reversal of 1898240 is 428981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1898197 and 1898206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539 + ... + 2021.

2^1898240 is an apocalyptic number.

1898240 is a gapful number since it is divisible by the number (10) 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 1898240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2274972).

1898240 is an abundant number, since it is smaller than the sum of its proper divisors (2651704).

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

1898240 is an equidigital number, since it uses as much as digits as its factorization.

1898240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1898240 is about 1377.7663081960. The cubic root of 1898240 is about 123.8179778204.

The spelling of 1898240 in words is "one million, eight hundred ninety-eight thousand, two hundred forty".