11481780 has 48 divisors (see below), whose sum is σ = 33191424. Its totient is φ = 2962560.

The previous prime is 11481773. The next prime is 11481797. The reversal of 11481780 is 8718411.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1227 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (691488).

Almost surely, 2^11481780 is an apocalyptic number.

11481780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11481780 is an abundant number, since it is smaller than the sum of its proper divisors (21709644).

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

11481780 is a wasteful number, since it uses less digits than its factorization.

11481780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216 (or 6214 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 30.

The square root of 11481780 is about 3388.4775342327. The cubic root of 11481780 is about 225.5986035576.

It can be divided in two parts, 1 and 1481780, that added together give a triangular number (1481781 = T₁₇₂₁).

The spelling of 11481780 in words is "eleven million, four hundred eighty-one thousand, seven hundred eighty".