1898040 has 32 divisors (see below), whose sum is σ = 5694480. Its totient is φ = 506112.

The previous prime is 1898027. The next prime is 1898047. The reversal of 1898040 is 408981.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1897989 and 1898007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7789 + ... + 8028.

2^1898040 is an apocalyptic number.

1898040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1898040 is an abundant number, since it is smaller than the sum of its proper divisors (3796440).

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

1898040 is a wasteful number, since it uses less digits than its factorization.

1898040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15831 (or 15827 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1898040 is about 1377.6937250347. The cubic root of 1898040 is about 123.8136291491.

The spelling of 1898040 in words is "one million, eight hundred ninety-eight thousand, forty".