1994538 has 48 divisors (see below), whose sum is σ = 4954176. Its totient is φ = 524160.

The previous prime is 1994521. The next prime is 1994543. The reversal of 1994538 is 8354991.

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

It is a junction number, because it is equal to n+sod(n) for n = 1994496 and 1994505.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6958 + ... + 7238.

It is an arithmetic number, because the mean of its divisors is an integer number (103212).

2^1994538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2477088).

1994538 is an abundant number, since it is smaller than the sum of its proper divisors (2959638).

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

1994538 is a wasteful number, since it uses less digits than its factorization.

1994538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 306 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 1994538 is about 1412.2811334858. The cubic root of 1994538 is about 125.8773056074.

The spelling of 1994538 in words is "one million, nine hundred ninety-four thousand, five hundred thirty-eight".