1994490 has 64 divisors (see below), whose sum is σ = 5443200. Its totient is φ = 519552.

The previous prime is 1994483. The next prime is 1994497. The reversal of 1994490 is 944991.

It is an interprime number because it is at equal distance from previous prime (1994483) and next prime (1994497).

It is not an unprimeable number, because it can be changed into a prime (1994497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22366 + ... + 22454.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2^1994490 is an apocalyptic number.

1994490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721600).

1994490 is an abundant number, since it is smaller than the sum of its proper divisors (3448710).

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

1994490 is a wasteful number, since it uses less digits than its factorization.

1994490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1994490 is about 1412.2641396000. The cubic root of 1994490 is about 125.8762958231.

The spelling of 1994490 in words is "one million, nine hundred ninety-four thousand, four hundred ninety".