11280657 has 8 divisors (see below), whose sum is σ = 15119584. Its totient is φ = 7481088.

The previous prime is 11280653. The next prime is 11280701. The reversal of 11280657 is 75608211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11280657 - 2² = 11280653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11280653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9163 + ... + 10320.

It is an arithmetic number, because the mean of its divisors is an integer number (1889948).

Almost surely, 2^11280657 is an apocalyptic number.

It is an amenable number.

11280657 is a deficient number, since it is larger than the sum of its proper divisors (3838927).

11280657 is a wasteful number, since it uses less digits than its factorization.

11280657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19679.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 11280657 is about 3358.6689327768. The cubic root of 11280657 is about 224.2735881696.

Adding to 11280657 its reverse (75608211), we get a palindrome (86888868).

The spelling of 11280657 in words is "eleven million, two hundred eighty thousand, six hundred fifty-seven".