11011428 has 18 divisors (see below), whose sum is σ = 27834534. Its totient is φ = 3670464.

The previous prime is 11011409. The next prime is 11011471. The reversal of 11011428 is 82411011.

It can be written as a sum of positive squares in only one way, i.e., 11009124 + 2304 = 3318^2 + 48^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 11011428.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152901 + ... + 152972.

It is an arithmetic number, because the mean of its divisors is an integer number (1546363).

Almost surely, 2^11011428 is an apocalyptic number.

11011428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11011428 is an abundant number, since it is smaller than the sum of its proper divisors (16823106).

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

11011428 is a wasteful number, since it uses less digits than its factorization.

11011428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305883 (or 305878 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 11011428 is about 3318.3471789432. The cubic root of 11011428 is about 222.4749995055.

Adding to 11011428 its reverse (82411011), we get a palindrome (93422439).

The spelling of 11011428 in words is "eleven million, eleven thousand, four hundred twenty-eight".