1240345440 has 96 divisors (see below), whose sum is σ = 4341224160. Its totient is φ = 330757632.

The previous prime is 1240345429. The next prime is 1240345459. The reversal of 1240345440 is 445430421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139239 + ... + 147878.

It is an arithmetic number, because the mean of its divisors is an integer number (45221085).

Almost surely, 2^1240345440 is an apocalyptic number.

1240345440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240345440 is an abundant number, since it is smaller than the sum of its proper divisors (3100878720).

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

1240345440 is a wasteful number, since it uses less digits than its factorization.

1240345440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287141 (or 287127 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1240345440 is about 35218.5383001623. The cubic root of 1240345440 is about 1074.4368248978.

Adding to 1240345440 its reverse (445430421), we get a palindrome (1685775861).

The spelling of 1240345440 in words is "one billion, two hundred forty million, three hundred forty-five thousand, four hundred forty".