11557290 has 32 divisors (see below), whose sum is σ = 27864000. Its totient is φ = 3067904.

The previous prime is 11557289. The next prime is 11557303. The reversal of 11557290 is 9275511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6961 + ... + 8459.

It is an arithmetic number, because the mean of its divisors is an integer number (870750).

Almost surely, 2^11557290 is an apocalyptic number.

11557290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11557290 is an abundant number, since it is smaller than the sum of its proper divisors (16306710).

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

11557290 is a wasteful number, since it uses less digits than its factorization.

11557290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 11557290 is about 3399.6014472288. The cubic root of 11557290 is about 226.0920735861.

The spelling of 11557290 in words is "eleven million, five hundred fifty-seven thousand, two hundred ninety".