11390556 has 12 divisors (see below), whose sum is σ = 26577992. Its totient is φ = 3796848.

The previous prime is 11390551. The next prime is 11390573. The reversal of 11390556 is 65509311.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11390551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474595 + ... + 474618.

Almost surely, 2^11390556 is an apocalyptic number.

It is an amenable number.

11390556 is an abundant number, since it is smaller than the sum of its proper divisors (15187436).

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

11390556 is a wasteful number, since it uses less digits than its factorization.

11390556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949220 (or 949218 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 11390556 is about 3374.9897777623. The cubic root of 11390556 is about 224.9995456781. Note that the first 3 decimals are identical.

Adding to 11390556 its reverse (65509311), we get a palindrome (76899867).

The spelling of 11390556 in words is "eleven million, three hundred ninety thousand, five hundred fifty-six".