10997978 has 8 divisors (see below), whose sum is σ = 16511040. Its totient is φ = 5494300.

The previous prime is 10997969. The next prime is 10997999. The reversal of 10997978 is 87979901.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (2063880).

Almost surely, 2^10997978 is an apocalyptic number.

10997978 is a deficient number, since it is larger than the sum of its proper divisors (5513062).

10997978 is a wasteful number, since it uses less digits than its factorization.

10997978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 10997978 is about 3316.3199483765. The cubic root of 10997978 is about 222.3843812893.

The spelling of 10997978 in words is "ten million, nine hundred ninety-seven thousand, nine hundred seventy-eight".