11653978 has 8 divisors (see below), whose sum is σ = 19978272. Its totient is φ = 4994556.

The previous prime is 11653951. The next prime is 11653981. The reversal of 11653978 is 87935611.

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

It is a self number, because there is not a number n which added to its sum of digits gives 11653978.

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, 416200 + ... + 416227.

It is an arithmetic number, because the mean of its divisors is an integer number (2497284).

Almost surely, 2^11653978 is an apocalyptic number.

11653978 is a deficient number, since it is larger than the sum of its proper divisors (8324294).

11653978 is an equidigital number, since it uses as much as digits as its factorization.

11653978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832436.

The product of its digits is 45360, while the sum is 40.

The square root of 11653978 is about 3413.7923194008. The cubic root of 11653978 is about 226.7208170318.

The spelling of 11653978 in words is "eleven million, six hundred fifty-three thousand, nine hundred seventy-eight".