11615280 has 40 divisors (see below), whose sum is σ = 36008112. Its totient is φ = 3097344.

The previous prime is 11615273. The next prime is 11615323. The reversal of 11615280 is 8251611.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11615280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23959 + ... + 24438.

Almost surely, 2^11615280 is an apocalyptic number.

11615280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11615280 is an abundant number, since it is smaller than the sum of its proper divisors (24392832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11615280 is a wasteful number, since it uses less digits than its factorization.

11615280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48413 (or 48407 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11615280 is about 3408.1197162072. The cubic root of 11615280 is about 226.4695903309.

Adding to 11615280 its reverse (8251611), we get a palindrome (19866891).

It can be divided in two parts, 1161 and 5280, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 11615280 in words is "eleven million, six hundred fifteen thousand, two hundred eighty".