1940669820 has 48 divisors (see below), whose sum is σ = 6037641120. Its totient is φ = 517511808.

The previous prime is 1940669803. The next prime is 1940669891. The reversal of 1940669820 is 289660491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1796377 + ... + 1797456.

It is an arithmetic number, because the mean of its divisors is an integer number (125784190).

Almost surely, 2^1940669820 is an apocalyptic number.

1940669820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1940669820 is an abundant number, since it is smaller than the sum of its proper divisors (4096971300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1940669820 is a wasteful number, since it uses less digits than its factorization.

1940669820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593851 (or 3593843 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1940669820 is about 44053.0341747308. The cubic root of 1940669820 is about 1247.3372266716.

The spelling of 1940669820 in words is "one billion, nine hundred forty million, six hundred sixty-nine thousand, eight hundred twenty".