1940138 has 4 divisors (see below), whose sum is σ = 2910210. Its totient is φ = 970068.

The previous prime is 1940137. The next prime is 1940143. The reversal of 1940138 is 8310491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1857769 + 82369 = 1363^2 + 287^2 .

It is not an unprimeable number, because it can be changed into a prime (1940131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485033 + ... + 485036.

2^1940138 is an apocalyptic number.

1940138 is a deficient number, since it is larger than the sum of its proper divisors (970072).

1940138 is an equidigital number, since it uses as much as digits as its factorization.

1940138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970071.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1940138 is about 1392.8883659504. Note that the first 3 decimals coincide. The cubic root of 1940138 is about 124.7223276412.

The spelling of 1940138 in words is "one million, nine hundred forty thousand, one hundred thirty-eight".