83800978 has 8 divisors (see below), whose sum is σ = 125784972. Its totient is φ = 41872656.

The previous prime is 83800961. The next prime is 83800979. The reversal of 83800978 is 87900838.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73153809 + 10647169 = 8553^2 + 3263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (83800979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9925 + ... + 16312.

Almost surely, 2^83800978 is an apocalyptic number.

83800978 is a deficient number, since it is larger than the sum of its proper divisors (41983994).

83800978 is a wasteful number, since it uses less digits than its factorization.

83800978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27836.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 83800978 is about 9154.2874108256. The cubic root of 83800978 is about 437.6057592485.

The spelling of 83800978 in words is "eighty-three million, eight hundred thousand, nine hundred seventy-eight".