1900394 has 16 divisors (see below), whose sum is σ = 2982696. Its totient is φ = 907200.

The previous prime is 1900373. The next prime is 1900397. The reversal of 1900394 is 4930091.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 874225 + 1026169 = 935^2 + 1013^2 .

It is a super-2 number, since 2×1900394² = 7222994710472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900397) 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, 4304 + ... + 4724.

2^1900394 is an apocalyptic number.

1900394 is a deficient number, since it is larger than the sum of its proper divisors (1082302).

1900394 is a wasteful number, since it uses less digits than its factorization.

1900394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1900394 is about 1378.5477866218. The cubic root of 1900394 is about 123.8647936618.

The spelling of 1900394 in words is "one million, nine hundred thousand, three hundred ninety-four".