78783772 has 12 divisors (see below), whose sum is σ = 142319296. Its totient is φ = 38121120.

The previous prime is 78783769. The next prime is 78783791. The reversal of 78783772 is 27738787.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317553 + ... + 317800.

Almost surely, 2^78783772 is an apocalyptic number.

It is an amenable number.

78783772 is a deficient number, since it is larger than the sum of its proper divisors (63535524).

78783772 is a wasteful number, since it uses less digits than its factorization.

78783772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635388 (or 635386 counting only the distinct ones).

The product of its digits is 921984, while the sum is 49.

The square root of 78783772 is about 8876.0223073176. The cubic root of 78783772 is about 428.6922082656.

The spelling of 78783772 in words is "seventy-eight million, seven hundred eighty-three thousand, seven hundred seventy-two".