1240842240 has 600 divisors, whose sum is σ = 5138389872. Its totient is φ = 283115520.

The previous prime is 1240842233. The next prime is 1240842269. The reversal of 1240842240 is 422480421.

1240842240 is a `hidden beast` number, since 12 + 408 + 4 + 2 + 240 = 666.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 72990712 + ... + 72990728.

Almost surely, 2^1240842240 is an apocalyptic number.

1240842240 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 1240842240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2569194936).

1240842240 is an abundant number, since it is smaller than the sum of its proper divisors (3897547632).

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

1240842240 is an equidigital number, since it uses as much as digits as its factorization.

1240842240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 1240842240 is about 35225.5906976732. The cubic root of 1240842240 is about 1074.5802550928.

The spelling of 1240842240 in words is "one billion, two hundred forty million, eight hundred forty-two thousand, two hundred forty".