860597978 has 4 divisors (see below), whose sum is σ = 1290896970. Its totient is φ = 430298988.

The previous prime is 860597977. The next prime is 860597993. The reversal of 860597978 is 879795068.

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., 657050689 + 203547289 = 25633^2 + 14267^2 .

It is not an unprimeable number, because it can be changed into a prime (860597971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215149493 + ... + 215149496.

Almost surely, 2^860597978 is an apocalyptic number.

860597978 is a deficient number, since it is larger than the sum of its proper divisors (430298992).

860597978 is a wasteful number, since it uses less digits than its factorization.

860597978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430298991.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The square root of 860597978 is about 29335.9502658428. The cubic root of 860597978 is about 951.1889004209.

The spelling of 860597978 in words is "eight hundred sixty million, five hundred ninety-seven thousand, nine hundred seventy-eight".