1240220544 has 32 divisors (see below), whose sum is σ = 3294336840. Its totient is φ = 413406720.

The previous prime is 1240220543. The next prime is 1240220551. The reversal of 1240220544 is 4450220421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240220543) 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, 1614487 + ... + 1615254.

Almost surely, 2^1240220544 is an apocalyptic number.

It is an amenable number.

1240220544 is an abundant number, since it is smaller than the sum of its proper divisors (2054116296).

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

1240220544 is an equidigital number, since it uses as much as digits as its factorization.

1240220544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229758 (or 3229746 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1240220544 is about 35216.7650984584. The cubic root of 1240220544 is about 1074.4007603839.

Adding to 1240220544 its reverse (4450220421), we get a palindrome (5690440965).

The spelling of 1240220544 in words is "one billion, two hundred forty million, two hundred twenty thousand, five hundred forty-four".