11311620 has 24 divisors (see below), whose sum is σ = 31672704. Its totient is φ = 3016416.

The previous prime is 11311589. The next prime is 11311661. The reversal of 11311620 is 2611311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11311620.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94204 + ... + 94323.

It is an arithmetic number, because the mean of its divisors is an integer number (1319696).

Almost surely, 2^11311620 is an apocalyptic number.

11311620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311620 is an abundant number, since it is smaller than the sum of its proper divisors (20361084).

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

11311620 is a wasteful number, since it uses less digits than its factorization.

11311620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188539 (or 188537 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 11311620 is about 3363.2751894545. The cubic root of 11311620 is about 224.4785951223.

Adding to 11311620 its reverse (2611311), we get a palindrome (13922931).

The spelling of 11311620 in words is "eleven million, three hundred eleven thousand, six hundred twenty".