11720778 has 8 divisors (see below), whose sum is σ = 23441568. Its totient is φ = 3906924.

The previous prime is 11720773. The next prime is 11720783. The reversal of 11720778 is 87702711.

It is an interprime number because it is at equal distance from previous prime (11720773) and next prime (11720783).

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

11720778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (11720773) 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 in 3 ways as a sum of consecutive naturals, for example, 976726 + ... + 976737.

It is an arithmetic number, because the mean of its divisors is an integer number (2930196).

Almost surely, 2^11720778 is an apocalyptic number.

11720778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11720778 is a wasteful number, since it uses less digits than its factorization.

11720778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953468.

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 11720778 is about 3423.5621799523. The cubic root of 11720778 is about 227.1531759991.

The spelling of 11720778 in words is "eleven million, seven hundred twenty thousand, seven hundred seventy-eight".