1940028656 has 20 divisors (see below), whose sum is σ = 3922232592. Its totient is φ = 927839616.

The previous prime is 1940028653. The next prime is 1940028691. The reversal of 1940028656 is 6568200491.

It is a happy number.

It is a super-2 number, since 2×1940028656² = 7527422372202332672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940028653) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2635541 + ... + 2636276.

Almost surely, 2^1940028656 is an apocalyptic number.

1940028656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1940028656 is an abundant number, since it is smaller than the sum of its proper divisors (1982203936).

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

1940028656 is a wasteful number, since it uses less digits than its factorization.

1940028656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271848 (or 5271842 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1940028656 is about 44045.7563903720. The cubic root of 1940028656 is about 1247.1998452707.

The spelling of 1940028656 in words is "one billion, nine hundred forty million, twenty-eight thousand, six hundred fifty-six".