11398815 has 12 divisors (see below), whose sum is σ = 19758024. Its totient is φ = 6079344.

The previous prime is 11398813. The next prime is 11398819. The reversal of 11398815 is 51889311.

It is not a de Polignac number, because 11398815 - 2¹ = 11398813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11398815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11398813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126609 + ... + 126698.

It is an arithmetic number, because the mean of its divisors is an integer number (1646502).

Almost surely, 2^11398815 is an apocalyptic number.

11398815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11398815 is a deficient number, since it is larger than the sum of its proper divisors (8359209).

11398815 is a wasteful number, since it uses less digits than its factorization.

11398815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253318 (or 253315 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 11398815 is about 3376.2131153113. The cubic root of 11398815 is about 225.0539130066.

It can be divided in two parts, 113988 and 15, that added together give a triangular number (114003 = T₄₇₇).

The spelling of 11398815 in words is "eleven million, three hundred ninety-eight thousand, eight hundred fifteen".