1240379280 has 240 divisors, whose sum is σ = 5011643520. Its totient is φ = 268572672.

The previous prime is 1240379267. The next prime is 1240379339. The reversal of 1240379280 is 829730421.

1240379280 is a `hidden beast` number, since 1 + 2 + 4 + 0 + 379 + 280 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89284 + ... + 102236.

It is an arithmetic number, because the mean of its divisors is an integer number (20881848).

Almost surely, 2^1240379280 is an apocalyptic number.

1240379280 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 1240379280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505821760).

1240379280 is an abundant number, since it is smaller than the sum of its proper divisors (3771264240).

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

1240379280 is a wasteful number, since it uses less digits than its factorization.

1240379280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998 (or 12989 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1240379280 is about 35219.0187256829. The cubic root of 1240379280 is about 1074.4465959961.

The spelling of 1240379280 in words is "one billion, two hundred forty million, three hundred seventy-nine thousand, two hundred eighty".