78783450 has 48 divisors (see below), whose sum is σ = 195924960. Its totient is φ = 20950720.

The previous prime is 78783437. The next prime is 78783473. The reversal of 78783450 is 5438787.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98452 + ... + 99248.

It is an arithmetic number, because the mean of its divisors is an integer number (4081770).

Almost surely, 2^78783450 is an apocalyptic number.

78783450 is an abundant number, since it is smaller than the sum of its proper divisors (117141510).

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

78783450 is a wasteful number, since it uses less digits than its factorization.

78783450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 78783450 is about 8876.0041685434. The cubic root of 78783450 is about 428.6916242237.

The spelling of 78783450 in words is "seventy-eight million, seven hundred eighty-three thousand, four hundred fifty".