11390631 has 16 divisors (see below), whose sum is σ = 17434368. Its totient is φ = 6480000.

The previous prime is 11390593. The next prime is 11390641. The reversal of 11390631 is 13609311.

It is not a de Polignac number, because 11390631 - 2¹⁸ = 11128487 is a prime.

It is a super-2 number, since 2×11390631² = 259492949156322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11390641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4191 + ... + 6351.

It is an arithmetic number, because the mean of its divisors is an integer number (1089648).

Almost surely, 2^11390631 is an apocalyptic number.

11390631 is a deficient number, since it is larger than the sum of its proper divisors (6043737).

11390631 is a wasteful number, since it uses less digits than its factorization.

11390631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 11390631 is about 3375.0008888888. Note that the first 3 decimals coincide. The cubic root of 11390631 is about 225.0000395062. Note that the first 4 decimals are identical.

Adding to 11390631 its reverse (13609311), we get a palindrome (24999942).

It can be divided in two parts, 11390 and 631, that added together give a palindrome (12021).

The spelling of 11390631 in words is "eleven million, three hundred ninety thousand, six hundred thirty-one".