11720390 has 32 divisors (see below), whose sum is σ = 23514624. Its totient is φ = 4169440.

The previous prime is 11720389. The next prime is 11720399. The reversal of 11720390 is 9302711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720399) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4037 + ... + 6303.

It is an arithmetic number, because the mean of its divisors is an integer number (734832).

Almost surely, 2^11720390 is an apocalyptic number.

11720390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11720390 is an abundant number, since it is smaller than the sum of its proper divisors (11794234).

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

11720390 is a wasteful number, since it uses less digits than its factorization.

11720390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 11720390 is about 3423.5055133591. The cubic root of 11720390 is about 227.1506694419.

The spelling of 11720390 in words is "eleven million, seven hundred twenty thousand, three hundred ninety".