1940397 has 8 divisors (see below), whose sum is σ = 2739456. Its totient is φ = 1217472.

The previous prime is 1940381. The next prime is 1940399. The reversal of 1940397 is 7930491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1940397 - 2⁴ = 1940381 is a prime.

It is a Smith number, since the sum of its digits (33) 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 (1940399) 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, 18973 + ... + 19074.

It is an arithmetic number, because the mean of its divisors is an integer number (342432).

2^1940397 is an apocalyptic number.

1940397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1940397 is a deficient number, since it is larger than the sum of its proper divisors (799059).

1940397 is a wasteful number, since it uses less digits than its factorization.

1940397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38067.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1940397 is about 1392.9813351226. The cubic root of 1940397 is about 124.7278773574.

The spelling of 1940397 in words is "one million, nine hundred forty thousand, three hundred ninety-seven".