11634381 has 32 divisors (see below), whose sum is σ = 19261440. Its totient is φ = 6879600.

The previous prime is 11634361. The next prime is 11634397. The reversal of 11634381 is 18343611.

11634381 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11634381 - 2¹³ = 11626189 is a prime.

It is a super-2 number, since 2×11634381² = 270717642506322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11634361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12316 + ... + 13226.

It is an arithmetic number, because the mean of its divisors is an integer number (601920).

Almost surely, 2^11634381 is an apocalyptic number.

11634381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11634381 is a deficient number, since it is larger than the sum of its proper divisors (7627059).

11634381 is a wasteful number, since it uses less digits than its factorization.

11634381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 968 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 11634381 is about 3410.9208434087. The cubic root of 11634381 is about 226.5936632932.

Adding to 11634381 its reverse (18343611), we get a palindrome (29977992).

The spelling of 11634381 in words is "eleven million, six hundred thirty-four thousand, three hundred eighty-one".