919993940 has 48 divisors (see below), whose sum is σ = 1961511552. Its totient is φ = 362414976.

The previous prime is 919993891. The next prime is 919993973. The reversal of 919993940 is 49399919.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404687 + ... + 406953.

It is an arithmetic number, because the mean of its divisors is an integer number (40864824).

Almost surely, 2^919993940 is an apocalyptic number.

It is an amenable number.

919993940 is an abundant number, since it is smaller than the sum of its proper divisors (1041517612).

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

919993940 is a wasteful number, since it uses less digits than its factorization.

919993940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576 (or 2574 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 53.

The square root of 919993940 is about 30331.4018799000. The cubic root of 919993940 is about 972.5866907474.

The spelling of 919993940 in words is "nine hundred nineteen million, nine hundred ninety-three thousand, nine hundred forty".