1240440000 has 140 divisors (see below), whose sum is σ = 4101580824. Its totient is φ = 330752000.

The previous prime is 1240439999. The next prime is 1240440011. The reversal of 1240440000 is 440421.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 114832 + ... + 125168.

Almost surely, 2^1240440000 is an apocalyptic number.

1240440000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2050790412).

1240440000 is an abundant number, since it is smaller than the sum of its proper divisors (2861140824).

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

1240440000 is an equidigital number, since it uses as much as digits as its factorization.

1240440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10372 (or 10347 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1240440000 is about 35219.8807493722. The cubic root of 1240440000 is about 1074.4641280886.

Adding to 1240440000 its reverse (440421), we get a palindrome (1240880421).

The spelling of 1240440000 in words is "one billion, two hundred forty million, four hundred forty thousand".