1240250440 has 128 divisors (see below), whose sum is σ = 3300393600. Its totient is φ = 415983360.

The previous prime is 1240250437. The next prime is 1240250447. The reversal of 1240250440 is 440520421.

It is a happy number.

It is a super-3 number, since 3×1240250440³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1240250447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966039 + ... + 967321.

It is an arithmetic number, because the mean of its divisors is an integer number (25784325).

Almost surely, 2^1240250440 is an apocalyptic number.

1240250440 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 1240250440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1650196800).

1240250440 is an abundant number, since it is smaller than the sum of its proper divisors (2060143160).

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

1240250440 is a wasteful number, since it uses less digits than its factorization.

1240250440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1314 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1240250440 is about 35217.1895528306. The cubic root of 1240250440 is about 1074.4093932644.

Adding to 1240250440 its reverse (440520421), we get a palindrome (1680770861).

The spelling of 1240250440 in words is "one billion, two hundred forty million, two hundred fifty thousand, four hundred forty".