8380978 has 4 divisors (see below), whose sum is σ = 12571470. Its totient is φ = 4190488.

The previous prime is 8380969. The next prime is 8380991. The reversal of 8380978 is 8790838.

It is a happy number.

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., 4566769 + 3814209 = 2137^2 + 1953^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2095243 + ... + 2095246.

Almost surely, 2^8380978 is an apocalyptic number.

8380978 is a deficient number, since it is larger than the sum of its proper divisors (4190492).

8380978 is a wasteful number, since it uses less digits than its factorization.

8380978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190491.

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

The square root of 8380978 is about 2894.9918825448. The cubic root of 8380978 is about 203.1257118082.

The spelling of 8380978 in words is "eight million, three hundred eighty thousand, nine hundred seventy-eight".