11280815 has 16 divisors (see below), whose sum is σ = 16661568. Its totient is φ = 7140096.

The previous prime is 11280767. The next prime is 11280817. The reversal of 11280815 is 51808211.

11280815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11280815 - 2⁶ = 11280751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11280817) 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, 11942 + ... + 12851.

It is an arithmetic number, because the mean of its divisors is an integer number (1041348).

Almost surely, 2^11280815 is an apocalyptic number.

11280815 is a deficient number, since it is larger than the sum of its proper divisors (5380753).

11280815 is a wasteful number, since it uses less digits than its factorization.

11280815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24818.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 11280815 is about 3358.6924539171. The cubic root of 11280815 is about 224.2746352440.

The spelling of 11280815 in words is "eleven million, two hundred eighty thousand, eight hundred fifteen".