11489780 has 12 divisors (see below), whose sum is σ = 24128580. Its totient is φ = 4595904.

The previous prime is 11489759. The next prime is 11489789. The reversal of 11489780 is 8798411.

It can be written as a sum of positive squares in 2 ways, for example, as 3794704 + 7695076 = 1948^2 + 2774^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11489789) 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, 287225 + ... + 287264.

It is an arithmetic number, because the mean of its divisors is an integer number (2010715).

Almost surely, 2^11489780 is an apocalyptic number.

11489780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11489780 is an abundant number, since it is smaller than the sum of its proper divisors (12638800).

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

11489780 is a wasteful number, since it uses less digits than its factorization.

11489780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574498 (or 574496 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 11489780 is about 3389.6577998376. The cubic root of 11489780 is about 225.6509871260.

The spelling of 11489780 in words is "eleven million, four hundred eighty-nine thousand, seven hundred eighty".