11538945 has 24 divisors (see below), whose sum is σ = 21820032. Its totient is φ = 5594400.

The previous prime is 11538911. The next prime is 11538953. The reversal of 11538945 is 54983511.

It is not a de Polignac number, because 11538945 - 2⁷ = 11538817 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11161 + ... + 12150.

It is an arithmetic number, because the mean of its divisors is an integer number (909168).

Almost surely, 2^11538945 is an apocalyptic number.

11538945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11538945 is a deficient number, since it is larger than the sum of its proper divisors (10281087).

11538945 is a wasteful number, since it uses less digits than its factorization.

11538945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23333 (or 23330 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 11538945 is about 3396.9022653000. The cubic root of 11538945 is about 225.9723841788.

It can be divided in two parts, 115 and 38945, that added together give a triangular number (39060 = T₂₇₉).

The spelling of 11538945 in words is "eleven million, five hundred thirty-eight thousand, nine hundred forty-five".