1901994 has 32 divisors (see below), whose sum is σ = 4173120. Its totient is φ = 575232.

The previous prime is 1901993. The next prime is 1902007. The reversal of 1901994 is 4991091.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1901993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637 + ... + 3279.

It is an arithmetic number, because the mean of its divisors is an integer number (130410).

2^1901994 is an apocalyptic number.

1901994 is an abundant number, since it is smaller than the sum of its proper divisors (2271126).

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

1901994 is a wasteful number, since it uses less digits than its factorization.

1901994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1901994 is about 1379.1279853589. The cubic root of 1901994 is about 123.8995457670.

The spelling of 1901994 in words is "one million, nine hundred one thousand, nine hundred ninety-four".