1946890 has 24 divisors (see below), whose sum is σ = 3854340. Its totient is φ = 707520.

The previous prime is 1946869. The next prime is 1946899. The reversal of 1946890 is 986491.

1946890 = 622² + 623² + ... + 626².

It can be written as a sum of positive squares in 2 ways, for example, as 1830609 + 116281 = 1353^2 + 341^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1946899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406 + ... + 2014.

2^1946890 is an apocalyptic number.

1946890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1946890 is a deficient number, since it is larger than the sum of its proper divisors (1907450).

1946890 is a wasteful number, since it uses less digits than its factorization.

1946890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638 (or 1627 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1946890 is about 1395.3100013975. The cubic root of 1946890 is about 124.8668448747.

The spelling of 1946890 in words is "one million, nine hundred forty-six thousand, eight hundred ninety".