83785378 has 4 divisors (see below), whose sum is σ = 125678070. Its totient is φ = 41892688.

The previous prime is 83785313. The next prime is 83785381. The reversal of 83785378 is 87358738.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 79512889 + 4272489 = 8917^2 + 2067^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20946343 + ... + 20946346.

Almost surely, 2^83785378 is an apocalyptic number.

83785378 is a deficient number, since it is larger than the sum of its proper divisors (41892692).

83785378 is a wasteful number, since it uses less digits than its factorization.

83785378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41892691.

The product of its digits is 1128960, while the sum is 49.

The square root of 83785378 is about 9153.4353114009. The cubic root of 83785378 is about 437.5786033463.

The spelling of 83785378 in words is "eighty-three million, seven hundred eighty-five thousand, three hundred seventy-eight".