11445720 has 256 divisors, whose sum is σ = 43545600. Its totient is φ = 2365440.

The previous prime is 11445689. The next prime is 11445737. The reversal of 11445720 is 2754411.

11445720 is a nontrivial binomial coefficient, being equal to C(4785, 2).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 63 ways as a sum of consecutive naturals, for example, 394666 + ... + 394694.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

Almost surely, 2^11445720 is an apocalyptic number.

11445720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11445720 is the 4784-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11445720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).

11445720 is an abundant number, since it is smaller than the sum of its proper divisors (32099880).

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

11445720 is a wasteful number, since it uses less digits than its factorization.

11445720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 11445720 is about 3383.1523761131. The cubic root of 11445720 is about 225.3621821153.

The spelling of 11445720 in words is "eleven million, four hundred forty-five thousand, seven hundred twenty".