10168978 has 4 divisors (see below), whose sum is σ = 15253470. Its totient is φ = 5084488.

The previous prime is 10168957. The next prime is 10168979. The reversal of 10168978 is 87986101.

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., 8862529 + 1306449 = 2977^2 + 1143^2 .

It is a super-2 number, since 2×10168978² = 206816227128968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 10168978.

It is not an unprimeable number, because it can be changed into a prime (10168979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2542243 + ... + 2542246.

Almost surely, 2^10168978 is an apocalyptic number.

10168978 is a deficient number, since it is larger than the sum of its proper divisors (5084492).

10168978 is an equidigital number, since it uses as much as digits as its factorization.

10168978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084491.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 10168978 is about 3188.8835036733. The cubic root of 10168978 is about 216.6502041404.

The spelling of 10168978 in words is "ten million, one hundred sixty-eight thousand, nine hundred seventy-eight".