1939930 has 8 divisors (see below), whose sum is σ = 3491892. Its totient is φ = 775968.

The previous prime is 1939913. The next prime is 1939937. The reversal of 1939930 is 399391.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1929321 + 10609 = 1389^2 + 103^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1939937) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 96987 + ... + 97006.

2^1939930 is an apocalyptic number.

1939930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1939930 is a deficient number, since it is larger than the sum of its proper divisors (1551962).

1939930 is a wasteful number, since it uses less digits than its factorization.

1939930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194000.

The product of its (nonzero) digits is 6561, while the sum is 34.

The square root of 1939930 is about 1392.8136989562. The cubic root of 1939930 is about 124.7178703687.

Adding to 1939930 its product of nonzero digits (6561), we get a palindrome (1946491).

The spelling of 1939930 in words is "one million, nine hundred thirty-nine thousand, nine hundred thirty".