1167597978 has 16 divisors (see below), whose sum is σ = 2472560640. Its totient is φ = 366305216.

The previous prime is 1167597973. The next prime is 1167598007. The reversal of 1167597978 is 8797957611.

It is not an unprimeable number, because it can be changed into a prime (1167597973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5723418 + ... + 5723621.

It is an arithmetic number, because the mean of its divisors is an integer number (154535040).

Almost surely, 2^1167597978 is an apocalyptic number.

1167597978 is an abundant number, since it is smaller than the sum of its proper divisors (1304962662).

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

1167597978 is a wasteful number, since it uses less digits than its factorization.

1167597978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11447061.

The product of its digits is 6667920, while the sum is 60.

The square root of 1167597978 is about 34170.1328355627. The cubic root of 1167597978 is about 1053.0066440239.

The spelling of 1167597978 in words is "one billion, one hundred sixty-seven million, five hundred ninety-seven thousand, nine hundred seventy-eight".