83706378 has 32 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 23882160.

The previous prime is 83706377. The next prime is 83706391. The reversal of 83706378 is 87360738.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (83706377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54643 + ... + 56153.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^83706378 is an apocalyptic number.

83706378 is an abundant number, since it is smaller than the sum of its proper divisors (107894262).

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

83706378 is a wasteful number, since it uses less digits than its factorization.

83706378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 83706378 is about 9149.1189739778. The cubic root of 83706378 is about 437.4410312903.

The spelling of 83706378 in words is "eighty-three million, seven hundred six thousand, three hundred seventy-eight".