919940644 has 12 divisors (see below), whose sum is σ = 1839881344. Its totient is φ = 394260264.

The previous prime is 919940603. The next prime is 919940653. The reversal of 919940644 is 446049919.

919940644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

919940644 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 919940594 and 919940603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16427484 + ... + 16427539.

Almost surely, 2^919940644 is an apocalyptic number.

It is an amenable number.

919940644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

919940644 is a wasteful number, since it uses less digits than its factorization.

919940644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32855034 (or 32855032 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 919940644 is about 30330.5233057394. The cubic root of 919940644 is about 972.5679094711.

The spelling of 919940644 in words is "nine hundred nineteen million, nine hundred forty thousand, six hundred forty-four".