1240994880 has 168 divisors, whose sum is σ = 4493361600. Its totient is φ = 313500672.

The previous prime is 1240994879. The next prime is 1240994891. The reversal of 1240994880 is 884990421.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 43381 + ... + 66059.

It is an arithmetic number, because the mean of its divisors is an integer number (26746200).

Almost surely, 2^1240994880 is an apocalyptic number.

1240994880 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 1240994880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2246680800).

1240994880 is an abundant number, since it is smaller than the sum of its proper divisors (3252366720).

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

1240994880 is a wasteful number, since it uses less digits than its factorization.

1240994880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22721 (or 22708 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1240994880 is about 35227.7572377238. The cubic root of 1240994880 is about 1074.6243158121.

The spelling of 1240994880 in words is "one billion, two hundred forty million, nine hundred ninety-four thousand, eight hundred eighty".