1240375720 has 32 divisors (see below), whose sum is σ = 2880875520. Its totient is φ = 480144960.

The previous prime is 1240375711. The next prime is 1240375723. The reversal of 1240375720 is 275730421.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (1240375723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498912 + ... + 501391.

It is an arithmetic number, because the mean of its divisors is an integer number (90027360).

Almost surely, 2^1240375720 is an apocalyptic number.

1240375720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240375720 is an abundant number, since it is smaller than the sum of its proper divisors (1640499800).

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

1240375720 is a wasteful number, since it uses less digits than its factorization.

1240375720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000345 (or 1000341 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 1240375720 is about 35218.9681847723. The cubic root of 1240375720 is about 1074.4455680757.

The spelling of 1240375720 in words is "one billion, two hundred forty million, three hundred seventy-five thousand, seven hundred twenty".