919784372 has 12 divisors (see below), whose sum is σ = 1733439876. Its totient is φ = 424515840.

The previous prime is 919784363. The next prime is 919784399. The reversal of 919784372 is 273487919.

It can be written as a sum of positive squares in 2 ways, for example, as 382750096 + 537034276 = 19564^2 + 23174^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 919784372.

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 3 ways as a sum of consecutive naturals, for example, 8844029 + ... + 8844132.

It is an arithmetic number, because the mean of its divisors is an integer number (144453323).

Almost surely, 2^919784372 is an apocalyptic number.

It is an amenable number.

919784372 is a deficient number, since it is larger than the sum of its proper divisors (813655504).

919784372 is a wasteful number, since it uses less digits than its factorization.

919784372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17688178 (or 17688176 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 919784372 is about 30327.9470455882. The cubic root of 919784372 is about 972.5128357225.

The spelling of 919784372 in words is "nine hundred nineteen million, seven hundred eighty-four thousand, three hundred seventy-two".